Search results “Wiki public key cryptography”

Modern day encryption is performed in two different ways. Check out http://YouTube.com/ITFreeTraining or http://itfreetraining.com for more of our always free training videos. Using the same key or using a pair of keys called the public and private keys. This video looks at how these systems work and how they can be used together to perform encryption.
Download the PDF handout
http://itfreetraining.com/Handouts/Ce...
Encryption Types
Encryption is the process of scrambling data so it cannot be read without a decryption key. Encryption prevents data being read by a 3rd party if it is intercepted by a 3rd party. The two encryption methods that are used today are symmetric and public key encryption.
Symmetric Key
Symmetric key encryption uses the same key to encrypt data as decrypt data. This is generally quite fast when compared with public key encryption. In order to protect the data, the key needs to be secured. If a 3rd party was able to gain access to the key, they could decrypt any data that was encrypt with that data. For this reason, a secure channel is required to transfer the key if you need to transfer data between two points. For example, if you encrypted data on a CD and mail it to another party, the key must also be transferred to the second party so that they can decrypt the data. This is often done using e-mail or the telephone. In a lot of cases, sending the data using one method and the key using another method is enough to protect the data as an attacker would need to get both in order to decrypt the data.
Public Key Encryption
This method of encryption uses two keys. One key is used to encrypt data and the other key is used to decrypt data. The advantage of this is that the public key can be downloaded by anyone. Anyone with the public key can encrypt data that can only be decrypted using a private key. This means the public key does not need to be secured. The private key does need to be keep in a safe place. The advantage of using such a system is the private key is not required by the other party to perform encryption. Since the private key does not need to be transferred to the second party there is no risk of the private key being intercepted by a 3rd party. Public Key encryption is slower when compared with symmetric key so it is not always suitable for every application. The math used is complex but to put it simply it uses the modulus or remainder operator. For example, if you wanted to solve X mod 5 = 2, the possible solutions would be 2, 7, 12 and so on. The private key provides additional information which allows the problem to be solved easily. The math is more complex and uses much larger numbers than this but basically public and private key encryption rely on the modulus operator to work.
Combing The Two
There are two reasons you want to combine the two. The first is that often communication will be broken into two steps. Key exchange and data exchange. For key exchange, to protect the key used in data exchange it is often encrypted using public key encryption. Although slower than symmetric key encryption, this method ensures the key cannot accessed by a 3rd party while being transferred. Since the key has been transferred using a secure channel, a symmetric key can be used for data exchange. In some cases, data exchange may be done using public key encryption. If this is the case, often the data exchange will be done using a small key size to reduce the processing time.
The second reason that both may be used is when a symmetric key is used and the key needs to be provided to multiple users. For example, if you are using encryption file system (EFS) this allows multiple users to access the same file, which includes recovery users. In order to make this possible, multiple copies of the same key are stored in the file and protected from being read by encrypting it with the public key of each user that requires access.
References
"Public-key cryptography" http://en.wikipedia.org/wiki/Public-k...
"Encryption" http://en.wikipedia.org/wiki/Encryption

Views: 405444
itfreetraining

Spies used to meet in the park to exchange code words, now things have moved on - Robert Miles explains the principle of Public/Private Key Cryptography
note1: Yes, it should have been 'Obi Wan' not 'Obi One' :)
note2: The string of 'garbage' text in the two examples should have been different to illustrate more clearly that there are two different systems in use.
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This video was filmed and edited by Sean Riley.
Computer Science at the University of Nottingham: http://bit.ly/nottscomputer
Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at: http://bit.ly/bradychannels

Views: 388818
Computerphile

lll➤ Gratis Crypto-Coins: https://crypto-airdrops.de
) More about MAC and hash functions for authentication and Introduction to public key cryptography in this IT Lecture.
Public-key cryptography, also known as asymmetric cryptography, is a class of cryptographic algorithms which require two separate keys, one of which is secret (or private) and one of which is public.
http://en.wikipedia.org/wiki/Public-key_cryptography
This video was made by another YouTube user and made available for the use under the Creative Commons licence "CC-BY". His channel can be found here:
https://www.youtube.com/user/StevesLectures

Views: 1708
Lernvideos und Vorträge

The history behind public key cryptography & the Diffie-Hellman key exchange algorithm.
We also have a video on RSA here: https://www.youtube.com/watch?v=wXB-V_Keiu8

Views: 579028
Art of the Problem

Googleusercontent search. Public key cryptography rsa encryption algorithm youtubersa public and decryption in a basic example wikibooks, open books the college of di management. Right up to modern however, public key algorithms are based on mathemat 30 jul 2012. Public key cryptography wikipediapublic encryption tutorialspoint. What is asymmetric cryptography (public key choosing the right public algorithm rsa vscryptography algorithmall about ssl what & digital certificates by chapter 8. It was developed in 1977 by the elementary working of public key cryptography is best explained with an hackers who intend to factor modulus without any other algorithm assist, 16 feb 2017 lecture 12 and rsalecture notes on computer network security avi kak ([email protected] 30 mar 2017 secret key encryption algorithms are very fast (compared with public key algorithms) and are well suited for performing cryptographic rsa algorithmrsa public key encryption algorithm. It can be used to encrypt a message without the need. One of the first, and probably best known public key scheme;. With most symmetric algorithms, the same key is used for both encryption and decryption, 12 apr 2008 public also known as asymmetric cryptography. Wikipedia wiki public key_cryptography url? Q webcache. It is widely used in protecting information transmission through unsecured communication channel. Encryption algorithm is complex enough to prohibit attacker from deducing the plaintext asymmetric cryptography a branch of where secret key can be divided someone with public able encrypt message, providing this chapter covers basic concepts. Dev1 documentationintroduction to public key cryptography. Asymmetric algorithms cryptography 2. Some well known asymmetric encryption algorithms are based on the rsa cryptosystem public key learn cryptography in simple and easy steps. The famous public key encryption algorithms include rsa, ecc and rabin cryptosystems chapter 1. Each person's own private and public keys must be mathematically related where the key is used to decrypt a communication sent using vice versa. Unfortunately public key algorithms tend to be based on number theory the most common asymmetric encryption algorithm is rsa; However, we will cryptography (asymmetric) uses like rsa and cryptography, or an scheme that unlike symmetric rely one both encrypt a radical departure from all has gone before. Edu) the rsa cryptosystem is most widely used public key cryptography algorithm in world. Public key cryptography wikipedia
public wikipedia en. Public key encryption algorithms computing and software wikipublic network security with openssl [book]. Introduction in today's networked world, many applications need security, and cryptography is one of the primary tools for providing that security 10 jun 2016 asymmetric cryptography, also known as public key uses increases more efficient factoring algorithms are discovered, this searchsecurity expert response, joel dubin explores two different encryption discusses how to make right choice cryptosystems, on other hand, use keys encrypt (rsa) algorithm most popular secure since time, a variety systems have been developed.

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mad Video Marketing

This is a segment of this full video:
https://www.youtube.com/watch?v=YEBfamv-_do
Diffie-Hellman key exchange was one of the earliest practical implementations of key exchange within the field of cryptography. It relies on the discrete logarithm problem. This test clip will be part of the final chapter of Gambling with Secrets!

Views: 434010
Art of the Problem

This is part two in my basic visual introduction to the concepts behind a blockchain. We build on the concepts from the previous video and introduce public / private key pairs and signing using an interactive web demo.
If you missed it, part 1 is here: https://youtu.be/_160oMzblY8
If you are interested in playing with this on your own, it is available online at:
http://anders.com/blockchain/public-private-keys/
The code that runs this demo is also on GitHub:
https://github.com/anders94/public-private-key-demo
If you want to know more about how public key cryptography works, see the Wikipedia page on it: https://en.wikipedia.org/wiki/Public-key_cryptography
The details of how public keys relate to private keys are hard to summarize, but it has to do with Euler's theorem. Basically, using Euler's theorem there is some math you can do to a number given some parameters (which I'll call the public key) which allows someone with some other parameters (which I'll call the private key) to decipher the original number without having to do brute force factorization because there is a shortcut way to find the phi of a prime number. Rather than me butchering the explanation, check this video series out for a more detailed explanation: https://www.khanacademy.org/computing/computer-science/cryptography/modern-crypt/v/the-fundamental-theorem-of-arithmetic-1
I'm @anders94 on Twitter and @andersbrownworth on Steemit.
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ETC: 0xab75ad757c89fa33b92090193a797e6700769ef8

Views: 68526
Anders Brownworth

Supplement to the cryptocurrency video: How hard is it to find a 256-bit hash just by guessing and checking? What kind of computer would that take?
Cryptocurrency video: https://youtu.be/bBC-nXj3Ng4
Thread for Q&A questions: http://3b1b.co/questions
Several people have commented about how 2^256 would be the maximum number of attempts, not the average. This depends on the thing being attempted. If it's guessing a private key, you are correct, but for something like guessing which input to a hash function gives a desired output (as in bitcoin mining, for example), which is the kind of thing I had in mind here, 2^256 would indeed be the average number of attempts needed, at least for a true cryptographic hash function. Think of rolling a die until you get a 6, how many rolls do you need to make, on average?
Music by Vince Rubinetti:
https://vincerubinetti.bandcamp.com/album/the-music-of-3blue1brown
------------------
3blue1brown is a channel about animating math, in all senses of the word animate. And you know the drill with YouTube, if you want to stay posted on new videos, subscribe, and click the bell to receive notifications (if you're into that).
If you are new to this channel and want to see more, a good place to start is this playlist: http://3b1b.co/recommended
Various social media stuffs:
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Reddit: https://www.reddit.com/r/3Blue1Brown

Views: 744741
3Blue1Brown

What are prime numbers and public key cryptosystem? What are the applications of prime numbers? How prime numbers are used in public key cryptosystems??
RSA is the first public key cryptosystems......READ MORE https://en.wikipedia.org/wiki/RSA_(cryptosystem)
To learn more about maths, subscribe to the youtube channel:
https://www.youtube.com/channel/UCg6HTPwYsVvgq4zxaJLvkXA?sub_confirmation=1
You might also enjoy the following:
Taxi number 1729
https://youtu.be/2jDWDt2RP7Y
Sum of the first 100 odd numbers
https://youtu.be/KOeEQSvyXsg
Definition of prime numbers
https://youtu.be/VpIKZvP2xEE

Views: 581
IWIZ maths

Only 4 steps stand between you and the secrets hidden behind RSA cryptography. Find out how to crack the world’s most commonly used form of encryption.
Tweet at us! @pbsinfinite
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Email us! pbsinfiniteseries [at] gmail [dot] com
Previous Episode:
Can We Combine pi & e into a Rational Number?
https://www.youtube.com/watch?v=bG7cCXqcJag&t=25s
Links to other resources:
Shor's paper: https://arxiv.org/abs/quant-ph/9508027v2
Lecture on Shor's Algorithm: https://arxiv.org/pdf/quant-ph/0010034.pdf
Blog on Shor's algorithm: http://www.scottaaronson.com/blog/?p=208
Video on RSA cryptography: https://www.youtube.com/watch?v=wXB-V_Keiu8
Another video on RSA cryptography: https://www.youtube.com/watch?v=4zahvcJ9glg
Euler's Big Idea: https://en.wikipedia.org/wiki/Euler%27s_theorem (I can find a non-wiki article, but I don't actually use this in the video. It's just where to learn more about the relevant math Euler did.)
Written and Hosted by Kelsey Houston-Edwards
Produced by Rusty Ward
Graphics by Ray Lux
Made by Kornhaber Brown (www.kornhaberbrown.com)
Challenge Winner - Reddles37
https://www.youtube.com/watch?v=bG7cCXqcJag&lc=z135cnmgxlbwch1ds233sbzgaojkivaz004
Comments answered by Kelsey:
Joel David Hamkins
https://www.youtube.com/watch?v=bG7cCXqcJag&lc=z13zdpcwyk2ofhugh04cdh4agsr2whmbsmk0k
PCreeper394
https://www.youtube.com/watch?v=bG7cCXqcJag&lc=z135w324kw21j1qi104cdzvrpoixslmq1jw

Views: 166879
PBS Infinite Series

Easy explanation of "public key encryption".
Instead of the usual terms of "public key" and "private key" this tutorial uses "lock" and "key".
==================================================
If you want to start protecting you email:
get free Privacy Everywhere Beta,
http://www.privacyeverywhere.net/

Views: 194235
Veet Vivarto

A quick and dirty explanation of SSL from the point of view of the SSL handshake and a quick look at Self-Signed Certificates and what they are for.
For a more basic overview of SSL check this very nice video: http://youtu.be/SJJmoDZ3il8
If you want to know more about public key cryptography see http://en.wikipedia.org/wiki/Public-key_cryptography
In the video here http://youtu.be/LHUbQtUeQ0o I show how to create a self-signed SSL certificate.
Here http://youtu.be/yjZOyANmKWU is part 1 of how to install an SSL certificate in the Apache webserver.
Ask for more videos on technical questions to [email protected]
For more information about BrightMinded, head over to http://www.brightminded.com.

Views: 102820
BrightMindedLtd

Video Dash 101 Series by Aaron Koenig
via Budget Proposal by Jan Heinrich Meyer :
https://www.dashcentral.org/p/dash101
Dash Wiki:
https://dashpay.atlassian.net/wiki/spaces/DOC/pages/1146949/Site+map
https://www.dash.org

Views: 4069
Dash - Digital Cash

To learn more about Cryptography and other forms of encryption, we recommend you turn to an unbiased source of information. You can learn more about this subject by visiting the following websites.
http://www.villanovau.com/resources/iss/what-is-cryptography/
or
http://en.wikipedia.org/wiki/Cryptography
What is Cryptography? Cryptography is the art of writing and solving codes. There are various forms of cryptography that includes public key encryption, secret key encryption, and other types of encryption.
This subject expands from classic computer era encryption to cryptanalysis in the modern era. In this video, we briefly cover three types of cryptographic encryption in 60 seconds.

Views: 2816
60SecondEDU

You've probably heard of them but didn't bother to set them up. Use SSH Keys to greatly enhance your security.
Sources:
https://www.digitalocean.com/community/tutorials/how-to-set-up-ssh-keys--2
https://wiki.archlinux.org/index.php/SSH_keys
https://wiki.debian.org/SSH
Music:
TheFatRat - Monody (feat. Laura Brehm)
https://www.youtube.com/watch?v=B7xai5u_tnk
"Nowhere Land" Kevin MacLeod (incompetech.com)
"Eternity" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

Views: 913
GrayWolfTech

Support Wendover Productions on Patreon: https://www.Patreon.com/Wendover Productions
85650789657397829 + 1402 more digits is an illegal number. To understand why this is, we need to learn a little bit of cryptology, a little bit of math, and a little bit of programming.
If you enjoyed this episode, please share it on Reddit, Twitter, Facebook, etc. For a small channel like this, it helps a lot.
Twitter: https://twitter.com/wendoverpro
Email: [email protected]
Series inspiration: https://en.wikipedia.org/wiki/Wikipedia:Unusual_articles
Episode inspiration:
https://en.wikipedia.org/wiki/Illegal_prime
Attributions:
Jeopardy music used under fair use courtesy of orangefreesounds.com
Select footage provided by VideoBlocks LLC
Music provided Epidemic Sound
Select maps provided by OpenStreetMap
Select maps provided by Google Maps
Select visuals provided by Wikipedia Commons
Licenses available upon request
Licensed under Creative Commons 3.0 or fair use guidelines

Views: 3096780
Wendover Productions

Before we delve into the inner workings of a bitcoin transaction I wanted to explain how the actual bitcoin address is derived from the public key which in turn is derived from the private key.
I take through step by step all the steps required to derived the checksums etc and show with a real example of a real bitcoin transaction.
Also discuss why checksums are included in Bitcoin addresses in order to eliminate the possibility of characters being corrupted, or modified in transit.
This is the cool tool for converted from base 58 encoded value to hex value.
http://lenschulwitz.com/base58
Good link talking about base 58 encoding.
https://en.bitcoin.it/wiki/Base58Check_encoding

Views: 9961
Matt Thomas

You're watching Infosec Bytes, a crash course in information security for journalists. We're based at the Centre for Investigative Journalism in London and supported by the Logan Foundation.
In this tutorial we show you how to use PGP to encrypt and decrypt text, and how to work with PGP signatures.
Make sure to watch our overview videos on PGP: https://www.youtube.com/playlist?list=PLOZKbRUo9H_pCTg8XdvkyGZ_lJbl1AA5X
To consult with an expert through CIJ, or to arrange a CIJ training session, get in touch: [email protected]
To support the Center for Investigative Journalism with a donation, please visit http://tcij.org/donate.
And if you want to watch our other videos, please go to http://infosecbytes.org or subscribe to our channel below.
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https://kubieziel.de/blog/
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Licensing and Attribution
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Views: 2505
Infosec Bytes

◕ RSA = Rivest Shamir Adler
Wiki: http://adf.ly/iO9H5
◕ RC4 = ARCFOUR
Wiki: http://adf.ly/iO9LB
◕ Numere Prime: http://adf.ly/iO9PB

Views: 10599
Cyber Code

It was introduced in 1991 by the national institute of standards and technology digital signature algorithm is a united states federal government standard for signatures. Dsa was proposed by the national institute of standards and technology (nist) in august 1991 for use their digital signature standard (dss), specified fips 186 22 jan 2016. The digital signature algorithm (dsa) is a federal information processing standard for signatures. 19 nov 2014 the encrypted hash along with other information, such as the hashing algorithm is the digital signature. The digital signature algorithm (dsa) ipadigital network security with dsa. Part 4 digital signature algorithm (dsa). It was proposed by the dsa stands for 'digital signature algorithm' and is specifically designed to produce digital signatures, not perform encryption 10 dec 2015 in many cases, a legally accepted alternative typically three algorithms involved with process. This section describes the dsa (digital signature algorithm) algorithm, which consists of 2 parts generation a pair public key and private key; Generation 23 aug 2012 digital algorithm (dsa) is united states federal government standard or fips for signatures. I n chapter 4 i discuss the sha 1 hash function. What is digital signature algorithm and standard. The reason for encrypting the hash digital signature is a cryptographic value that calculated from data and to algorithm which produces on given algorithm, or dsa, uses different signing encryption rsa, yet provides same level of security. Digital signature algorithm (dsa) uniface fo. Wikipedia wiki digital_signature_algorithm "imx0m" url? Q webcache. Is one of three digital signature schemes 25 aug 2013 public key cryptography using discrete logarithms. It was proposed in 1991 15 dec 2001 digital signature algorithm (dsa) (revised), and part 2 the dsa. Dsa is one of three signature schemes specified in fips 186. Encryption what is the difference between dsa and rsa? Stack digital signature algorithm crypto wiki cryptopp. Chapter 5 gives a final digital signature algorithm (dsa) the dsa was developed by national institute for standards and testing (nist) security p dss standardand michael pace in this paper i will discuss standard (dss) 14 aug 2017 both keys are used to encrypt message special that further assures of. Digital signature algorithm (de la cruz, genelyn). In august 1991 the national institute of standards and technology (nist) proposed dsa for use in their digital signature standard (dss) adopted it as fips 186 1993 a algorithm (dsa) refers to signatures. Digital signature algorithm wikipediawhat is a digital (dsa)? Definition from dsa vocal technologieswhat signature? whatis what rsa, and ecc? Ssl247. Digital signature algorithm wikipedia
digital wikipedia en. Rsa why can't dsa be used for encryption? Cryptography stack what is a digital signature it does, how works cryptomathic. But what is a dsa an algorithm for asymmetric key cryptography, defined as unit

Views: 6
E Info

Krack is bad for WiFi, Equifax loses their IRS contract, and an RSA crypto key is vulnerable to being reverse engineered. Today on ThreatWire.
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https://www.krackattacks.com/
https://www.kb.cert.org/vuls/byvendor?searchview&Query=FIELD+Reference=228519&SearchOrder=4
https://github.com/kristate/krackinfo
https://www.wired.com/story/krack-wi-fi-wpa2-vulnerability/
https://arstechnica.com/information-technology/2017/10/severe-flaw-in-wpa2-protocol-leaves-wi-fi-traffic-open-to-eavesdropping/
http://www.zdnet.com/article/here-is-every-patch-for-krack-wi-fi-attack-available-right-now/
https://www.theverge.com/2017/10/16/16481818/wi-fi-attack-response-security-patches
https://threatpost.com/equifax-takes-down-compromised-page-redirecting-to-adware-download/128406/
https://krebsonsecurity.com/2017/10/equifax-credit-assistance-site-served-spyware/
https://www.cnet.com/news/equifax-website-ads-served-adware-malware-expert-finds/
https://randy-abrams.blogspot.com/2017/10/new-equifax-website-compromise.html
https://www.cnet.com/news/irs-reportedly-suspends-7-2-million-equifax-contract/
https://arstechnica.com/tech-policy/2017/10/after-second-bungle-irs-suspends-equifaxs-taxpayer-identity-contract/
https://arstechnica.com/information-technology/2017/10/crypto-failure-cripples-millions-of-high-security-keys-750k-estonian-ids/
https://en.wikipedia.org/wiki/Coppersmith%27s_attack
https://www.yubico.com/keycheck/
https://keychest.net/roca
Youtube Thumbnail credit:
https://static.pexels.com/photos/7101/wood-coffee-iphone-notebook.jpg

Views: 64240
Hak5

This is a tutorial on PyCrypto, looking at encrypting and decrypting files using AES-256. All Links and Slides will be in the description. Subscribe for more cool stuff!
Block Cipher Modes - http://en.wikipedia.org/wiki/Block_cipher_mode_of_operation
Slides & files - https://www.mediafire.com/folder/b4om18885dp0k/Tutorial_10_-_PyCrypto
Python - http://python.org/
Ubuntu - http://www.ubuntu.com/
DrapsTV Twitter - https://twitter.com/DrapsTV
If you like what you see be sure to subscribe and thumbs up!

Views: 41180
DrapsTV

GPG Encryption for Windows, what happens if Keybase disappears, Free SSL certificates and how you could end up in prison for withholding your decryption keys. All that and more, this time on Hak5.
--
Jay - "great vid is there a windows equivalent?"
Yes, you'll need GPG4Win and Node.js for Windows
http://gpg4win.org/download.html
https://nodejs.org/en/#download
When installing use the Node.js Command Prompt to issue "npm install -g keybase-installer"
If you run into errors make sure GPG is in your PATH environment variable
Евгений Фуко -
Do not sudo npm -g install, change npm path to ~/.npm or something, less sudo is better.
And you can replace install to a simple i so npm i -g keybase will just work.
And since you typed ls kerby.jpg you could use a xdg-open kerby.jpg from same terminal, or even add alias open=xdg-open to your ~/.bashrc
The KapSteR -
"What DE are you using on your Ubuntu-box? Looks sweet..."
Gnome3
samurai1200
"what happens if keybase disappears?"
Great question. We hate relying on proprietary stuff. This is why keybase is so great since it's building on top of open standards like OpenPGP. We can continue using GPG with our public/private keypair on all of our encrypted documents created using Keybase even if the service goes under. Also, Keybase is open source so it's likely to live on as long as developers and maintainers want it to.
dfvhs wrj j refvyht -
"What up with the UK thing?"
Read up on Key disclosure law.
The Regulation of Investigatory Powers Act 2000 - or RIPA - requires persons to supply decrypted information and/or keys to government representatives with a court order. Failure to disclose carries a maximum penalty of two years in jail.
The provision was first used against animal rights activists in November 2007,[21] and at least three people have been prosecuted and convicted for refusing to surrender their encryption keys,[22] one of whom was sentenced to 13 months' imprisonment.[23]
http://www.theregister.co.uk/2009/11/24/ripa_jfl
http://www.theregister.co.uk/2010/10/06/jail_password_ripa/
Here in the United States we have the Fifth Amendment to our Constitution which protects witnesses from being forced to incriminate themselves.
https://en.wikipedia.org/wiki/Key_disclosure_law
Let's Encrypt launches first cert
https://www.eff.org/deeplinks/2015/09/one-small-certificate-web-one-giant-certificate-authority-web-encryption
https://letsencrypt.org/2015/09/14/our-first-cert.html
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Please watch: "Bash Bunny Primer - Hak5 2225"
https://www.youtube.com/watch?v=8j6hrjSrJaM
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Views: 23010
Hak5

A simple lesson on Encryption and Decryption. I actually used caesar cipher (shift cipher) to encrypt the message, but the point was just to show how an encrypted message makes no sense.
To learn more about public-key encryption, check out this Wikipedia article:
http://en.wikipedia.org/wiki/Public-key_cryptography

Views: 784
hacks4class

Certificates are used to prove identity and used for creating secure communication. Check out http://itfreetraining.com for more of our always free training videos. This video looks at how a certificate works, what is a certificate and how they are used for identification and secure communication.
Download the PDF handout
http://itfreetraining.com/Handouts/Certificates/WhatAreCertificates.pdf
What is a certificate?
A certificate is an electronic document that contains data fields. When compared to a traditional paper certificate there are some similarities between an electronic certificate and a physical certificate. Digital certificates like a physical certificate are issued by an authority. For example, a university may issue a certificate to a student to show that they have completed the necessary work in order to graduate. The next question is, would you trust a physically certificate? Digital certificates work the same way. They are issued from an authority and the question becomes would you trust the authority that issued the certificate? Electronic certificates also contain other fields like who or what the certificate was issued to, how long it is valid, the public key and the digital signature. If a digital certificate is presented to a user or computer, the user or computer is able to check the certificate to ensure the person using it should be using it. Also the certificate contains a digital signature which allows the certificate to be checked to make sure it has not been modified.
Digital Signature
A digital signature provides a method for a certificate to be checked to ensure it has not been modified. In order to do this, a hash value is created for the certificate. To generate a hash value the certificate is put through a function to create a single value. Hash functions are designed so different certificates will not produce the same value, however the hash value cannot be used to generate the original certificate. The same principal applies to a person's fingerprints. They can be used to identify a person, however using a finger print you could not work out the features of a person like what color hair they have. When a certificate is created, the hash value for that certificate is also created. Using a function involving the private key, a digital signature is created and added to the certificate.
Digital Signature Example
When a certificate is used, in order to check the certificate has not been changed, the following is done: The computer generates the hash value for the certificate. Next, the digital signature is put through a function using the public key which should result in the same hash value. If both values match, the certificate has not been modified. This prevents a 3rd party taking a certificate, changing the values in the certificate and using the certificate.
Trust Model
Certificates work off a trust model. An example of a trust model in computers is that a computer may have a sticker on it indicating which operating systems it will run. The consumer, seeing this sticker, must trust that the manufacture would not put this sticker on the laptop unless it will run that operating system. The customer must also trust the creator of that operating system would not allow a computer manufacturer to put a sticker on a computer that would not run that operating system.
Certificate Trust Model
Certificates are generally deployed in a hierarchy. At the top is the root certificate authority. This can be an internal Certificate Authority or an external authority like VeriSign. When an authority like VeriSign issues a certificate, they will perform a number of checks on the individual purchasing the certificate to ensure that they are a valid business. When a certificate is used it can be checked to see which authority issued that certificate. In order for the certificate to be used, the computer must trust the authority that it was issued from. Authorities like VeriSign are trusted by default on most operating systems.
Certificate Error
If a certificate is presented to the computer and it is not trusted, the computer will generate an error asking if the users want to trust the certificate. It is up to the user to decide if they believe the certificate is valid.
Certificate Hierarchy
Certificates use a hierarchy. At the top is the root CA, below these are subordinate CA's. Any level can issue certificates to subordinate CA's or direct to users, computers or devices. If the user, computer or device trusts the root CA, then any certificate that is issued by any CA in the hierarchy will automatically be trusted and thus used by the client.
References
"MCTS 70-640 Configuring Windows Server 2008 Active Directory Second edition" pg 771-775
"Public key certificate" http://en.wikipedia.org/wiki/Public_key_certificate

Views: 287006
itfreetraining

This episode is brought to you by Squarespace: http://www.squarespace.com/physicsgirl
With recent high-profile security decryption cases, encryption is more important than ever. Much of your browser usage and your smartphone data is encrypted. But what does that process actually entail? And when computers get smarter and faster due to advances in quantum physics, how will encryption keep up?
http://physicsgirl.org/
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Special thanks to Nathan Lysne
Source:
http://gva.noekeon.org/QCandSKD/QCand...
http://physicsworld.com/cws/article/n...
https://epic.org/crypto/export_contro...
http://fas.org/irp/offdocs/eo_crypt_9...
Music: APM and YouTube

Views: 254667
Physics Girl

In this vid we'll fill out the bodies to three of the steps in AES. These three steps are AddRoundKey, SubBytes and ShiftRows. The remaining steps to AES are rather fiddly, MixColumns and ExpandKey, so we'll look at those separately.
I've also taken the opportunity to introduce Galois fields for the AddRoundKey section. AddRoundKey is really just a matter of performing XOR, but it helps to understand Galois fields before we come to the MixColumns step.
Link to the S_Box on Wikipedia:
https://en.wikipedia.org/wiki/Rijndael_S-box
Link to the Finite Field/Galois Field Wikipedia page:
https://en.wikipedia.org/wiki/Finite_field
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Play Intergalactic Memory for Free:
http://apps.microsoft.com/windows/en-us/app/intergalactic-memory-free/92c1094c-32f5-4730-86f3-c43c46affe52
Full version of Intergalactic Memory:
http://apps.microsoft.com/windows/app/intergalactic-memory/ae9457e6-dbc1-468b-93cb-39f80835f19a
FaceBook:
www.facebook.com/pages/WhatsaCreel/167732956665435

Views: 27936
What's a Creel?

Dash: QT Wallet Private Key Export/Import
What is :
https://dashpay.atlassian.net/wiki/pages/viewpage.action?pageId=33325335
How to:
https://dashpay.atlassian.net/wiki/pages/viewpage.action?pageId=33325343
Tipping Address:
Xovo9BEAN3sKwxAAt5Knqdo1gqhodnzNu7
Dash is DigitalCash
Dash is a decentralized cryptographic currency that works similar to Bitcoin, but fixes many of Bitcoin's problems. Dash's InstantX technology makes transactions almost instant, meaning it is suitable for in-person trades and point-of-sale purchases. Not only that, but Dash is truly private, meaning that nobody can mine the blockchain to find details of your purchases or financial history. You wouldn't advertise your credit card statement--why advertise your crypto purchases?
Dash is built from Bitcoin's core code, meaning that it remains compatible with systems that are already designed to work with Bitcoin. The creator of Dash, Evan Duffield, works with a "core team" of almost 20 people to continually improve the Dash code and ecosystem. Since Dash implemented its self-funding mechanism, a number of new developers have begun working on various aspects of the project as well, including retail point-of-sale and vending machine integration.
Dash's masternodes enable investors to earn a 10+% annual return on investment while performing vital services for the network. Masternodes power both the privacy and instant transaction features of Dash. Not only that, but masternode owners are able to vote on which projects will receive Dash's monthly self-generated budget funding. Dash's budget system provides tens of thousands of dollars in recurring funds, every month, which masternode owners allocate to projects designed to improve the Dash ecosystem.
https://www.dash.org

Views: 4781
Dash

Like our facebook page:
https://facebook.com/tech.skillz
More on Bitcoin Private Keys:
https://en.bitcoin.it/wiki/Private_key

Views: 39
Celebrity Vids

Hello everyone, welcome to another episode of PIVX Class. Today is a short, but sweet intro to cryptography. We really just try and cover what the term means and a tiny bit about how cryptocurrency uses it. Hope it is helpful!
Sources:
https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/intro-to-cryptography
http://www.dictionary.com/browse/cryptography?s=t
https://www.investopedia.com/tech/explaining-crypto-cryptocurrency/
https://en.wikipedia.org/wiki/Cryptography
https://www.worldcryptoindex.com/how-cryptography-is-used-cryptocurrency/
https://www.techopedia.com/definition/14316/hashing
https://blog.wetrust.io/why-do-i-need-a-public-and-private-key-on-the-blockchain-c2ea74a69e76
http://www.dummies.com/software/other-software/bitcoin-public-private-keys/
https://www.coindesk.com/bitcoin-hash-functions-explained/
Thank you to the PIVX community for your ongoing support.
Special thanks:
@Bouilla from EMTEX Studio for the amazing sound engineering: https://emtex-studio.com/
@Hanna and the support team for their hard work translating each video
@Veramis for editing the video scripts and helping make the videos their best.
PIVX Class:
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Facebook: https://www.facebook.com/PIVXClass
Pinterest: https://www.pinterest.ca/pivxorg/pivx-class-~-cryptocurrency-education/
PIVX Crypto:
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Twitter: https://twitter.com/_pivx
Reddit: https://www.reddit.com/r/pivx/
Facebook: https://www.facebook.com/PIVXCrypto/
Instagram: https://www.instagram.com/pivxcrypto/
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PIVXfans: https://pivxfans.fancorps.com/
Steemit: https://steemit.com/@pivx/
DISCLAIMER: This channel is funded by the PIVX DAO's budget system. Every month it is voted in to be funded an amount that can be viewed on our proposal tracking sites. I make no attempts to hide this and I do my best to be un-bias in non-opinion segments.

Views: 85
PIVX Class

The public and the rsa algorithm is asymmetric cryptography. Googleusercontent search. Rsa is one of the first practical public key cryptosystems and widely used for secure data transmission. It only exists if e and phi have no common factors. As explained by our toy rsa encryption. New the rsa algorithm is first of its kind that can be used for both public key in message, a claims to sender but b has no means verifying encryption definition technology developed based on this principle, uses prime 16 feb 2017 review cryptography as block cipher encrypting message meant. Public key systems do not suffer from this problem because of their use two different keys. A 768 bit key has been broken. This means that d is the number less than (p 1)(q 1) such when multiplied by e, it equal to 1 modulo we use rsa algorithm (named after inventors rivest, shamir, adleman) with two numbers are relatively prime they have no divisor in 6 apr 2007 used for both public key encryption and digital gcd(e, (n)) 1(where gcd greatest common denominator) 4 7 sep 201328 mar 2010 an understood so few people almost this (d 11) t will give us a remainder of one 28 2014 Rsa (algorithm) simple english wikipedia, free encyclopedia. Public key and private. This is also called public key cryptography, because one of them can be given to everyone shor's algorithm for quantum computers. Deducing an rsa key, therefore, requires extraordinary we will see two aspects of the cryptosystem, firstly generation key pair and secondly encryption decryption algorithms. What is rsa? Webopedia definitionpublic key encryption by rsa algorithmrsa algorithm concept and example youtube. A public key cryptography algorithm which uses prime factorization as the trapdoor one way function. Rsa (cryptosystem) wikipedia. Rsa (algorithm) simple english wikipedia, the free encyclopedia. Rsa encryption simple explanation don the developer. Define the rsa algorithm is based on fact that there no efficient way to factor very large numbers. As the name couriers or other secure means are typically used. In such a cryptosystem, the encryption key is public and different from decryption which kept secret (private) 12 nov 2014 cryptography, also known as asymmetric uses two but mathematically linked keys, one private. What is rsa algorithm (rivest shamir adleman)? Definition from in cryptography geeksforgeeksthe algorithmwhat a algorithm? . Wikipedia wiki rsa_(algorithm) url? Q webcache. Rsa (algorithm) rsa is algorithm used by modern computers to encrypt and decrypt messages. It is an asymmetric cryptographic algorithm. Asymmetric means that there are two different keys. Messages are 3 jun 2009 the security of rsa algorithm has so far been validated, since no it is a permutation because satisfies (b), meaning every ciphertext. The modular inverse d is defined as the integer value such that ed 1 mod phi. Rsa (algorithm) simple english wikipedia, the free encyclopedia
rsa encyclopedia. Asymmetric actually means th

Views: 28
Til Til

CryptoWall Decrypter
What happened to your files ?
All of your files were protected by a strong encryption with RSA-2048 using CryptoWall.
More information about the encryption keys using RSA-2048 can be found here: http://en.wikipedia.org/wiki/RSA_(cryptosystem)
What does this mean ?
This means that the structure and data within your files have been irrevocably changed, you will not be able to work with them, read them or see them,
it is the same thing as losing them forever, but with our help, you can restore them.
How did this happen ?
Especially for you, on our server was generated the secret key pair RSA-2048 - public and private.
All your files were encrypted with the public key, which has been transferred to your computer via the Internet.
Decrypting of your files is only possible with the help of the private key and decrypt program, which is on our secret server.
What do I do ?
Alas, if you do not take the necessary measures for the specified time then the conditions for obtaining the private key will be changed.
If you really value your data, then we suggest you do not waste valuable time searching for other solutions because they do not exist.
If you have important files and want them back you have to decrypt with this tool.
I can provide you this program together with the secret key. All i need is the character ids that found on your infected files..
This tool if for the old version of cryptowall i can also generate keys for new version (cryptowall 3.0) with brute force.. pm me with your fb email address if interested.

Views: 116974
Goldpis Isda

Wie man ein Schlüsselpaar erstellt, Publickey-Authentifizierung auf dem Server aktiviert und eine Verbindung mit PuTTY herstellt.
Etwas wichtiges habe ich im Video vergessen, aber dafür lohnt es nicht ein neues zu machen:
Beim Passwortverfahren wird der Hash des Passworts auf dem Server gespeichert, kann von einem Eindringling (z.B. per PHP) gelesen und dann eventuell geknackt werden. Das ist beim PubKey-Verfahren unmöglich.
PuTTY:
http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html
http://de.wikipedia.org/wiki/Public-Key-Authentifizierung

Views: 3550
x96.in

A history of the extremely influential Leonhard Euler. Also an overview of the following encryption algorithms: Symmetric Key Algorithm, Diffie Hellman Key-Exchange, and RSA Encryption. This video is intended for mathematicians at a college level or above.
Works Cited
1) Turner, Clay S. “Euler’s Totient Function and Public Key Cryptography.” Clays Turner, 7 Nov. 2008, www.claysturner.com/dsp/totient.pdf.
2) Weaving, Timothy. “Euler’s Theorem and RSA Public Key Cryptography.” VKnight.org, 18 Jan. 2016, vknight.org/Computing_for_mathematics/Assessment/IndividualCoursework/PastCourseWorks/2015-2016/weaving2015-2016.pdf.
3) ArtOfTheProblem, director. YouTube. YouTube, YouTube, 30 July 2012, www.youtube.com/watch?v=wXB-V_Keiu8.
4) Khan, Sal. “The Fundamental Theorem of Arithmetic.” Khan Academy, www.khanacademy.org/computing/computer-science/cryptography/modern-crypt/v/the-fundamental-theorem-of-arithmetic-1.
5)Suter, Rudolf. “Die Basler Universität = L'université De Bâle = The University of Basel.” Die Basler Universität = L'université De Bâle = The University of Basel, Schweizerische Kreditanstalt, 1962.
6)“Johann Bernoulli.” Johann Bernoulli, Great Neck Publishing.
7)“Leonhard Euler.” Wikipedia, Wikimedia Foundation, 14 Apr. 2018, en.wikipedia.org/wiki/Leonhard_Euler.
8)Boyer, Carl B. “Leonhard Euler.” Encyclopædia Britannica, Encyclopædia Britannica, Inc., 8 Apr. 2018, www.britannica.com/biography/Leonhard-Euler.
9) “Math Origins: The Totient Function.” Math Origins: The Totient Function | Mathematical Association of America, www.maa.org/press/periodicals/convergence/math-origins-the-totient-function.
10) Euler The Master Of Us All Pdf, decaops.com/file/euler-the-master-of-us-all-pdf.
11)Euler_Grave_at_Alexander_Nevsky_Monastry. Russia.
12)Biographies, Famous. “Leonhard Euler.” Famous Biographies, famousbiographies.org/wp-content/uploads/2016/01/Leonhard-Euler.jpg.
13)PINIMG. “Euler's Publication.” Pinimg, i.pinimg.com/originals/38/7c/f4/387cf423c418707bd05ddb9777975218.jpg.

Views: 20
Math 370 Spring '18 UMass

This Tutorial Explain What is Digital Signature in Hindi.
A Digital Signature in Hindi (not to be confused with a digital certificate) is a mathematical technique used to validate the authenticity and integrity of a message, software or digital document.
It Covers Points like digital signature in cryptography in hindi, digital signature in network security and digital signature in dbms(advance database management system)
Digital Signature Use Asymatric Key to Encrypt Data.
Digital signatures are often used to implement electronic signatures, a broader term that refers to any electronic data that carries the intent of a signature
How digital signatures work
Digital signatures are based on public key cryptography, also known as asymmetric cryptography. Using a public key algorithm such as RSA, one can generate two keys that are mathematically linked: one private and one public. To create a digital signature, signing software (such as an email program) creates a one-way hash of the electronic data to be signed. The private key is then used to encrypt the hash. The encrypted hash -- along with other information, such as the hashing algorithm -- is the digital signature. The reason for encrypting the hash instead of the entire message or document is that a hash function can convert an arbitrary input into a fixed length value, which is usually much shorter. This saves time since hashing is much faster than signing.
Subscribe my Channel: https://goo.gl/FYkHc5
Reference Link: https://en.wikipedia.org/wiki/Digital_signature

Views: 325
Introtuts

In this video we cover basic terminology in cryptography, including what is a ciphertext, plaintext, keys, public key crypto, and private key crypto.

Views: 257288
Pico Cetef

Zhang Fangguo is an associate professor at the Department of Electronics and Communication Engineering of the School of Information Science and Technology at Sun Yat-sen University in P.R. China. His main research interests include Pairings Based Cryptosystems, Elliptic Curve and Hyperelliptic Curve Cryptography, Provable Security and Design and Analysis of New Public Key Cryptosystems.His main contributions include ID-based ring signature schemes (joint work with Kwangjo Kim) - Asiacrypt 2003, short signature schemes (joint work with Rei Safavi-Naini and Willy Susilo) - PKC 2004 and ID-based short signature schemes (joint work with Willy Susilo and Yi Mu) - Financial Cryptography 2005, and restrictive partial blind signature schemes (joint work with Xiaofeng Chen, Yi Mu and Willy Susilo) - Financial Cryptography 2006.
https://en.wikipedia.org/wiki/Zhang_Fangguo

Views: 5
WikiTubia

Digital signature algorithm (zkrcen dsa, doslovn peloeno z anglitiny algoritmus digitlnho podpisu) je standard americk vldy pro digitln podpis the digital (dsa) is a federal information processing for signatures. Digital signature algorithm wikipedie cs. If interested in the elliptic curve variant, dsa is an algorithm for asymmetric key cryptography, defined as a united states federal government standard digital signatures dsa, signature asymetrick ifrovac algoritmus pouvan hlavn pro digitln podpisy. Dsa digital signature algorithm vocal technologies. This section describes the dsa (digital signature algorithm) algorithm, which consists of 2 parts generation a pair public key and private key; Generation vocal's digital algorithm is available with wide range cryptographic solutions in both hardware software form factors (dsa) refers to standard for signatures. B to the k power g, with a couple of other helpful hints (you 25 aug 2013 public key cryptography using discrete logarithms. Digital signature algorithm crypto wiki cryptopp. Digital signature algorithm (dsa) uniface fo. Encryption) 15 may 2010 and see 'what is better for gpg keys rsa or dsa? Dsa a variant on the elgamal schnorr algorithms creates 320 bit signature, 11 2012 dsa stands 'digital signature algorithm' specifically designed to produce digital signatures, not perform encryption crypto algorithm ('encryption key') ('decryption based discrete logarithms i. Chapter 5 gives a final digital signature algorithm (dsa) the dsa was developed by national institute for standards and testing (nist) security p dss standardand michael pace in this paper i will discuss standard (dss) data structures algorithms tutorial beginners learn using c, c java simple easy steps starting from 19 nov 2015 is. Dsa is one of three signature schemes specified in fips 186. Encryption what is the difference between dsa and rsa? Stack rsa why can't be used for encryption? Cryptography stack quora. Part 4 digital signature algorithm (dsa) Digital wikipediedigital wikipedia. Digital signature algorithm (dsa) di management. Googleusercontent search. In august 1991 the national institute of standards and 3leden 2016. Digital signature algorithm wikipedie. What is a digital signature algorithm (dsa)? Definition from what standard (dss)? whatis the (dsa) johannes buchmann network security with dss and dsa. What is dsa algorithm? Youtubewhat (digital signature algorithm)? Herong yang. Wikipedia wiki digital_signature_algorithm url? Q webcache. It was introduced in 1991 by the national institute of standards and technology digital signature standard (dss) is algorithm (dsa) developed u. National security agency (nsa) to generate a digital signatur

Views: 95
Hadassah Hartman

https://grain.io/
https://btcprivate.org/
What is a private key: https://en.bitcoin.it/wiki/Private_key
Donate ETH: 0x3572B44a7bE93743Fe77516095Ec09F190bC887d

Views: 167
hansiharjunharja

The Key Selection Vector means the numeric value associated with a Device Key Set and distributed by Licensor or its designee to Adopters and used to support authentication of Licensed Products and Revocation. It is considered a confidential set of keys used in Restricted Authentication process of the HDCP. Restricted authentication is an AKE method for devices with limited computing resources. This method is used by copying devices of any kind (such as DV recorders or D-VHS recorders) and devices communicating with them for authenticating copy-one-generation and no-more-copies contents. The restricted authentication protocol employs asymmetric key management and common key cryptography and relies on the use of shared secrets and hash functions to respond to a random challenge.
https://en.wikipedia.org/wiki/Key_selection_vector
Please support this channel and help me upload more videos. Become one of my Patreons at https://www.patreon.com/user?u=3823907

Views: 2
WikiTubia

He is designed to 3 feb 2017 the honey encryption scheme an effective algorithm, and it also being discussedaes encryption; Brute force attack abstract another plot that gives flexibility against animal compels assault by guaranteeing messages unscrambled with readme. Many luring technologies that also use the term honey have been 25 aug 2017. When data is protected by honey encryption 13 may 2015 massachusetts institute of technologyimplementation an scheme resilient to brute force attacks this problem, paper proposed extended (xhe) juels and ristenpart [8,9] a (he) we introduce encryption(he), simple, general approach encrypting messages using low min entropy keys such as passwords. For example, password vaults tend to be backed up in the cloud a way that relies for security on encryption under user selected passwords 6 nov 2017 honey deceives attackers incorrectly guessed key is valid. As an added layer of protection, the scientists have proposed linking a password system to in this review paper we studied honey encryption (he) which is new scheme that provides resilience against brute force attacks by ensuring 15 sep 2014 with so called encryption, fake, but real looking data served up response incorrect guesses passwords or keys. Honey encryption is a security tool that makes it difficult for an attacker who carrying out brute force attack to know if he has correctly guessed password or key 3 may 2017 ari jules and thomas ristenpart, have put forward interesting spin this problem known as honey applications. 14 jul 2014 it security training & resources by infosec institute honey encryption security beyond the brute force boundthomas ristenpartencryption for which decrypting 29 jan 2014 a new approach to encryption beats attackers by presenting them with fake data 31 jan 2014 this is where honey encryption comes in. What is honey encryption? Youtube. Honey encryption is a type of data that 'produces ciphertext, which, when decrypted with an incorrect key as guessed by the attacker, presents plausible looking yet plaintext password or. Mdthis program is for educational purposes. Honey encryption and how it might help security samanage blogimplementing the honey for securing public eudl. Wikipedia wiki honey_encryption "imx0m" url? Q webcache. Github victornguyen75 honey encryption decryption beyond message recovery security cryptology. Googleusercontent search. Review on honey encryption technique (pdf download available). This encryption algorithm displays seeming plausible output for every 23 feb 2016 juels and ristenpart introduced honey (he) showed how ciphertext with an incorrect key yields a decoy (or honey) message. Honey encryption algorithms security combating brute force attack. Honey encryption wikipedia
honey wikipedia en. Honey encryption wikipediawhat is honey? Definition from whatis searchcio. Honey encryption security beyond the brute force bound screening covert key using honey to rule out improving of in database ijaems.

Views: 12
E Answers

Views: 1290
Matt Gemmell

Views: 15494
Derek Greig

In this tutorial I show you how to install DiskCryptor and easily encrypt your windows system drive to protect your desktop or laptop running Microsoft Windows. (DO NOT use this if you know your system actively uses UEFI instead of standard/legacy BIOS mode.)
Download link: https://diskcryptor.net/wiki/Main_Page
Prevent thieves getting all your personal and private files by following this simple tutorial using free and open source software (FOSS). Make sure you are not one of the statistics who gets their privacy smashed and identity stolen by thieves getting access to your identity and private information. Encrypt your system!
Please like and subscribe to get more tutorials as I make them. You might like to have a look at the channel and see what other tutorials interest you.
This is a perfect TrueCrypt alternative since they have effectively shutdown. See this video for details about the fate of TrueCrypt: https://www.youtube.com/watch?v=Hkode8VCcKI
Please follow along carefully and remember you are responsible for your computer and what you do with it. Not choosing to encrypt may come back to bite you in the future. If in the future you decide you want to decrypt your drives for whatever reason, you simply right-click on the drive and hit "Decrypt" and follow the instructions, then remove the bootloader from your drive as I show in the video. Then you can either use your computer completely unencrypted or try a different encryption product at that point.
Also, if you are technically inclined and have the resources and time you can create a live CD that you can use to boot up a copy of DiskCryptor in the event you have problems with a computer or need to quickly get access to the software to perform some action on an encrypted drive. Details are here: https://diskcryptor.net/wiki/LiveCD
Enjoy the tutorial.

Views: 47259
TutsTeach

(Sous-titres en français bientôt disponibles)
Amid today's debate on electronic surveillance and the ongoing Arab Spring protests, this young 22 year old Montreal hacktivist founded Cryptocat, a free, accessible, and open source encrypted chat application. His mission: make private communication on the web available to all.
Dans le contexte du printemps arabe et des enjeux de surveillance électronique, ce jeune cybertactiviste montréalais a fondé à l'âge 22 ans Cryptocat: un logiciel de conversation protégé par cryptographie simple à utiliser, gratuit et à code source ouvert. Sa mission: rendre accessible à tous la communication privée sur le web.
https://twitter.com/kaepora
https://crypto.cat/
For more information, please visit http://tedmontreal.com/
Introduction motion animation by: http://www.departement.ca/
In the spirit of ideas worth spreading, TEDx is a program of local, self-organized events that bring people together to share a TED-like experience. At a TEDx event, TEDTalks video and live speakers combine to spark deep discussion and connection in a small group. These local, self-organized events are branded TEDx, where x = independently organized TED event. The TED Conference provides general guidance for the TEDx program, but individual TEDx events are self-organized.* (*Subject to certain rules and regulations)

Views: 11098
TEDx Talks

My entry for the Breakthrough Junior Challenge.
Solution to test exercise:
p = 71, q = 89
n = 6319
phi = 6160
e = 3
d = 4107
"Go" = 715 (3320 encoded)
"Up" = 2116 (5350 encoded)
References:
Modular Arithmetic: http://artofproblemsolving.com/wiki/index.php/Modular_arithmetic/Introduction
Euclidean Algorithm: http://artofproblemsolving.com/wiki/index.php/Euclidean_algorithm
Euler Totient Function: http://www.artofproblemsolving.com/wiki/index.php/Euler's_totient_function
Exponentiation By Squaring: https://en.wikipedia.org/wiki/Exponentiation_by_squaring
Euler’s Theorem: https://en.wikipedia.org/wiki/Euler%27s_theorem
Fermat’s Little Theorem: https://en.wikipedia.org/wiki/Fermat%27s_little_theorem
---There are many fascinating concepts and theories to choose from. Why did you pick this one?
I picked RSA encryption as my topic because it is fundamental to the security of the internet, something which most people take for granted. Everyone should know why it is safe to send messages across the internet without fear of them being stolen. Since RSA is one of the primary encryption methods used by modern computers, people should know how it works. I also felt that this topic would be something that the majority of people don't actually know, so it would be beneficial to have a video such as this that is accessible for the average person to understand. I also make it a point to add in a clear, concrete example of why RSA encryption works, so that someone who watched the video could visualize the way RSA protects our information.
---Tell us about yourself! Why do you believe that it is important to study mathematics, life sciences, or physics?
I have a lot of experience in math. Ever since I was young, math has been my favorite subject. In high school I took an accelerated math course through multi variable calculus, and I also participated in many math competitions such as USAMO. The reason that studying STEM areas is so important is because they literally represent the future progress of our society. Each discovery and breakthrough furthers our society's knowledge and gives us access to new technology to improve the quality of life of everyone on the planet. Furthermore, STEM jobs pay very nice salaries, making it very easy to have a comfortable life as a STEM worker.
---What specific area(s) of mathematics, life sciences, or physics would you like to pursue in the future and why?
Currently I am not sure exactly which areas of math I will pursue in the future, since I could see myself in either a pure or an applied field. But hey, isn't that what college is for?
---Tell us about a teacher who inspired your interest in mathematics, life sciences, or physics. What is the teacher's name? What did that teacher do to develop your passion for learning and discovery?
The teacher who inspired me the most was my math team coach, Mr. Curt Michener. He convinced me to join the math team, and eventually I caught the math bug. If it weren't for him, I would have never truly realized my love for mathematics. He also provided me many opportunities to participate in math competitions, such as AMC, Math League, and Moody's Mega Math Challenge. I couldn't have done it without Mr. Michener.
---If you win the Breakthrough Junior Challenge, your school will receive a new, cutting-edge science lab from Cold Spring Harbor. How would this lab benefit your school?
The lab would reward those who worked hard in their science classes, hopefully causing more people to fall in love with science. That would be great for my school because we always need more science majors.

Views: 1722
Jordan Haack

Welcome to part four in our series on Elliptic Curve Cryptography. I this episode we dive into the development of the public key. In just 44 lines of code, with no special functions or imports, we produce the elliptic curve public key for use in Bitcoin. Better still, we walk you through it line by line, constant by constant. Nothing makes the process clearer and easier to understand than seeing it in straight forward code. If you've been wondering about the secp256k1 (arguably the most important piece of code in Bitcoin), well then this is the video for you.
This is part 4 of our upcoming series on Elliptic Curves. Because of such strong requests, even though this is part 4, it is the first one we are releasing. In the next few weeks we will release the rest of the series. Enjoy.
Here's the link to our Python code (Python 2.7.6):
https://github.com/wobine/blackboard101/blob/master/EllipticCurvesPart4-PrivateKeyToPublicKey.py
Here's the private key and the link to the public address that we use. Do you know why it is famous?
Private Key : A0DC65FFCA799873CBEA0AC274015B9526505DAAAED385155425F7337704883E
Public Address on Blockchain.info
https://blockchain.info/address/1JryTePceSiWVpoNBU8SbwiT7J4ghzijzW
Here's the private key we use at the end:
42F615A574E9CEB29E1D5BD0FDE55553775A6AF0663D569D0A2E45902E4339DB
Public Address on Blockchain.info
https://blockchain.info/address/16iTdS1yJhQ6NNQRJqsW9BF5UfgWwUsbF
Welcome to WBN's Bitcoin 101 Blackboard Series -- a full beginner to expert course in bitcoin. Please like, subscribe, comment or even drop a little jangly in our bitcoin tip jar 1javsf8GNsudLaDue3dXkKzjtGM8NagQe. Thanks, WBN

Views: 19963
CRI

http://en.wikipedia.org/wiki/Serpent_(cipher)
Serpent is regarded to have a higher level of security than the current Rijndael based AES-256. Our GPU accelerated implementation shows more than 200x speedup against an optimized single threaded CPU algorithm running on a Core i7 3770.

Views: 631
TwistCoder

This tutorial will walk through installing the dogtag certificate system, which is an open source certificate authority that can be added to your organization and used to issue your own trusted certificates.
Dogtag -http://pki.fedoraproject.org/wiki/PKI_Main_Page
Fedora Theme Files - http://www.formatccolon.com/blog/wp-content/uploads/2014/06/dogtag_fedora_theme.tar.gz
Full Text Tutorial - http://www.formatccolon.com/blog/installing-dogtag-certificate-authority-server

Views: 7215
Clusterfrak

If you liked, please, become a patron!
Patreon: https://www.patreon.com/amazingace
This is a tutorial about how to use PGP (pretty good privacy) with the progam GPA (best tool IMO for newbs).
IF YOU HAVE ANY QUESTIONS PLEASE LEAVE IN THE COMMENTS BELOW!
PayPal donations: [email protected] (pennies count)

Views: 69591
Darien Bargo

© 2018 Swiftmailer transport options

Business continuity resources may include spare or redundant systems that serve as a backup in case primary systems fail. Systems for crisis communications may include existing voice and data technology for communicating with customers, employees and others. Equipment. Equipment includes the means for teams to communicate. Radios, smartphones, wired telephone and pagers may be required to alert team members to respond, to notify public agencies or contractors and to communicate with other team members to manage an incident. Many tools may be required to prepare a facility for a forecast event such as a hurricane, flooding or severe winter storm. Materials and Supplies. Materials and supplies are needed to support members of emergency response, business continuity and crisis communications teams. Food and water are basic provisions. Systems and equipment needed to support the preparedness program require fuel. Emergency generators and diesel engine driven fire pumps should have a fuel supply that meets national standards or local regulatory requirements. That means not allowing the fuel supply to run low because replenishment may not be possible during an emergency. Spare batteries for portable radios and chargers for smartphones and other communications devices should be available. Funding. Worksheets.