Search results “Symmetric-key cryptography java example”

Ciphers in Java
five confidentiality modes of operation for symmetric key block cipher algorithms
The Electronic Codebook Mode (ECB)
The Cipher Block Chaining Mode (CBC)
The Cipher Feedback Mode (CFB)
The Output Feedback Mode (OFB)
The Counter Mode (CT)
Symmetric encryption example with padding and CBC using DES
Basic symmetric encryption example with padding
using the KeyGenerator

Views: 5068
Zariga Tongy

In this video you will see how to encrypt and decrypt the text information using the AES algorithm in Java Cryptography.
For more tutorials visit: http://www.step2know.com

Views: 36897
Infinity

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Password Encryption.java
JAVA ENCRYPTION/DECRYPTION PROGRAM HELP
Encrypting and Decrypting Java
Cryptography using Java in Netbeans IDE
Cryptography using Java in Netbeans IDE
Java Cryptography APIs
Cryptography
Encrypting and Decrypting a text file in java

Views: 88550
ProgrammingKnowledge

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: 405306
itfreetraining

In this video you will see how to encrypt and decrypt the text information using the RSA algorithm in Java Cryptography.
For more tutorials visit: http://www.step2know.com

Views: 16571
Infinity

+++See my latest video: Internet Security or Die+++ https://youtu.be/CzB5n6_pBfk
Learn Public Key Cryptography in just 18 Minutes - Cryptography Tutorial
In this Cryptography Tutorial, I teach you Public Key cryptography basics. Specifically I’m going to explain to you how the cryptography works, that allows you to do online shopping. We are so used to online shopping, a.k.a. e-commerce, that we take it for granted. But e-commerce would not be possible at all without public key cryptography. Not only will I explained to you the details of public-key cryptography and how that makes e-commerce possible, but I’m going to explain it in 15 minutes, and explain it without math, by using the Blackbox model.
IMHO, cryptography basics should not include math. Cryptography explained with math simply muddies the waters to those without extensive math background.
Let’s start by taking a brief look at Classic cryptography, which is been around for thousands of years. Classic cryptography is also called secret key cryptography or Symmetric cryptography.
A cipher is some sort of a mathematical algorithm that we use to scramble text. In the blackbox model the cipher itself is the blackbox into which we input plaintext and the key. The plaintext is the message that we wish to encrypt and the key is simply a string of numbers, generally binary ones and zeros. The output we get from the blackbox is called ciphertext, which is the plaintext that has been encrypted in such a way that it can only be decrypted by someone that has the same key that originally encrypted the data in the first place.
Some examples of Symmetric cryptography that are used today are DES, Triple DES & AES. These are the same as the ciphers used for thousands of years in that the same key encrypts and decrypts them. However the modern algorithm is much stronger.
If we use of good cipher such as AES the only way an attacker can decrypt the ciphertext is to try every possible key, called a brute force attack. That is why the longer the key the more security you get.
Now supposing Bob wants to buy something on the website Alice.com. He needs to make sure his personal information cannot be seen by anybody eavesdropping on his conversation over the public Internet. At first glance it seems easy enough for Bob to encrypt his plaintext personal information with Symmetric cryptography, using a secret key, send it across the Internet in an encrypted fashion, and then have Alice.com decrypt the information with the same secret key. The problem arises: how do Bob and Alice.com both get the same secret key, while making sure no one else gets the key? The answer is no one has ever thought of a very efficient way. In order to do this, a whole new type of encryption called public key encryption, a.k.a. Asymmetric encryption had to be invented first. In fact it was invented in the 1970s thousands of years after mankind first started using cryptography.

Views: 28481
Packethacks.com

https://8gwifi.org/CipherFunctions.jsp
Cryptographic Algorithms generally fall into one of two different categories, or are a combination of both.
Symmetric
Fast
Only provide confidentiality
Examples: DES, AES, Blowfish, RC4, RC5
Asymmetric
Large mathematical operations make it slower than symmetric algorithms
No need for out of band key distribution (public keys are public!)
Scales better since only a single key pair needed per individual
Can provide authentication and nonrepudiation
Examples: RSA, El Gamal, ECC, Diffie-Hellman
problem with symmetric key cryptography
DES (Data Encryption Standard)
64 bit key that is effectively 56 bits in strength
Actual algorithm is called DEA (Data Encryption Algorithm)
DES Modes
Electronic Code Book
Cipher Block Chaining (most commonly used for general purpose encryption)
Cipher Feedback
Output Feedback
Counter Mode (used in IPSec)
3DES
112-bit effective key length
Uses either 2 or 3 different smaller keys in one of several modes
Modes
EEE2/3
EDE2/3
AES
NIST replaced DES in 1997 with this
Uses the Rijndael algorithm
Supports key/block sizes of 128, 192, and 256 bits
Uses 10/12/14 rounds as block size increases
IDEA (International Data Encryption Algorithm)
Operates on 64 bit blocks in 8 rounds with 128 bit key
Considered stronger than DES and is used in PGP
Blowfish
64 bit block cipher with up to 448 bit key and 16 rounds
Designed by Bruce Schneier
RC4
Stream cipher with variable key size created by Ron Rivest
RC5
Another Rivest cipher
Block cipher with 32/64/128 bit blocks and keys up to 2048 bits
RC6
Beefier version of RC5 submitted as AES candidate
CAST
64 bit block cipher with keys between 40-128 bits with 12-16 rounds depending on key length
CAST-256 used 128-bit blocks and keys from 128-256 bits using 48 rounds
SAFER (Secure and Fast Encryption Routine)
Set of patent-free algorithms in 64 and 128 bit block variants
Variation used in Bluetooth
Twofish
Adapted version of Blowfish with 128 bit blocks, 128-256 bit keys and 16 rounds
AES Finalist
Kryptografie mit symmetrischem Schlüssel
symmetric key cryptography
symmetric key cryptography tutorial
symmetric key cryptography example
symmetric key cryptography vs asymmetric key cryptography
symmetric and asymmetric key cryptography
symmetric key cryptography
Kryptografie mit symmetrischem Schlüssel
Kryptographie mit symmetrischem Schlüssel
Kryptographie mit symmetrischem Schlüssel
Kryptografie mit symmetrischem Schlüssel und asymmetrische Schlüsselkryptographie
symmetrische und asymmetrische Schlüsselkryptographie
Kryptografie mit symmetrischem Schlüssel

Views: 36808
Zariga Tongy

netbeans netbeans 8 data encryptionencryption and decryption ide Password Encryption.java JAVA ENCRYPTION/DECRYPTION PROGRAM HELP Encrypting and Decrypting Java Cryptography using Java in Netbeans IDE Cryptography using Java in Netbeans IDE Java Cryptography APIs Cryptography
What is Encryption?:
Encryption is the process of translating plain text data (plaintext) into something that appears to be random and meaningless (ciphertext). Decryption is the process of converting ciphertext back to plaintext. To encrypt more than a small amount of data, symmetric encryption is used.
Netbeans Website: http://adf.ly/1h2Inx
Tools:
GameGuardian: http://adf.ly/1hZ1hZ (tool used in this hack)
XmodeGames: http://adf.ly/1hBEky
GameKiller: http://adf.ly/1h2YGk
KingRoot: http://adf.ly/1h2YKX (tool used in this hack)
Aptoid: http://adf.ly/1h2YIp
How to gai root access: https://www.youtube.com/watch?v=o1voDJpQMvA.
Other Hacks:
https://www.youtube.com/watch?v=h94DoZEoxhg
https://www.youtube.com/watch?v=gwAHLNq-NH0
https://www.youtube.com/watch?v=mr8ieRDo6QY
https://www.youtube.com/watch?v=guuprvULARw&t
https://www.youtube.com/watch?v=9JpGyDjAK6M
https://www.youtube.com/watch?v=atsGr-BWJR8
https://www.facebook.com/QuantumTechnoMinds/

Views: 8741
Abus Onni

This video show you how to use previously written AES algorithm code to encrypt and decrypt the text.

Views: 23712
Infinity

This video explains you how to encrypt and decrypt an image using Java. You can also encrypt any file using this format...!
Project Link: https://www.dropbox.com/s/gk51444iadh0edz/Cryptography.rar?dl=0

Views: 31167
Thamizh arasaN

Learn How Encrypt And Decrypt String Using TripleDES in Java

Views: 2395
Admin S

Hi guys we will learn in this tutorial series about the basics of cryptography and how to implement it in java.
We will start with hashing to encryption and then to encoding.
In hashing we will be using SHA-1, in ecryption we will focus on AES-128 and for encoding we will use Apache's Base64 encoder and decoder.
Here we will implement the Code Block Chaining or CBC algorithim to understand Encryption in Java. We will understand what is IV parameter and what is its purpose and how to implement it here in java.
We will also see the decryption in the same.

Views: 539
Code Digest With MrWallet

XOR Cipher in Java
01:00 - Encryption
03:08 - testing encryption
03:24 - Decryption
05:28 - Decryption Testing
xor encryption and decryption using java programming language
xor cipher is a simple cipher, in which each individual letter of message is XOR-ed with key, to get encrypted text.
In this video we get cipher text in hexadecimal

Views: 95
VoxelPixel

AES algorithm is the Block Cipher Symmetric Algorithm
Block Size is 128 bits
Key Size is 128 bits ( 4 words or 16 Bytes )
Sub Key Size is 1 Word (32 bit)
Number of Sub keys 44 Words
Number of Rounds 10
Cipher Text Size is 128 bits

Views: 29382
Sundeep Saradhi Kanthety

Enroll to Full Course: https://goo.gl/liK0Oq
Networks#4: The video explains the RSA Algorithm (public key encryption) Concept and Example along with the steps to generate the public and private keys. The video also provides a simple example on how to calculate the keys and how to encrypt and decrypt the messages.
For more, visit http://www.EngineeringMentor.com.
FaceBook: https://www.facebook.com/EngineeringMentor.
Twitter: https://www.twitter.com/Engi_Mentor

Views: 153924
Skill Gurukul

Learn to Encrypt and Decrypt data on Android Applications with the Advanced Encryption Standard (AES) Algorithm.
Note that this tutorial has been made by Tamil for the SSaurel's Channel. If you want to collaborate on the SSaurel's Channel, don't hesitate to send me your ideas for further details.
► Discover all the Android Apps offered by SSaurel Mobile Apps : https://play.google.com/store/apps/dev?id=6924401024188312025
► Learn to create Android Apps step by step on the SSaurel's Blog : https://www.ssaurel.com/blog
► Enter in the Bitcoin and cryptocurrency World : https://www.toutsurlebitcoin.fr

Views: 19109
Sylvain Saurel

Mansi Sheth, Security Researcher, Veracode Inc
Are you overwhelmed by the overabundance of choices provided by the Java Cryptography API when choosing an encryption algorithm? Are you on top of all the latest happenings in cryptographic communities and know which cryptographic primitives can be broken and how? Due to time constraints, do you find yourself copy/pasting from the internet, hoping and praying that it’s secured? If any of your answers are “yes,” come to this session. It goes over all cryptographic primitive: RNGs, encryption/decryption algorithms, HMACs, and so on. The presentation points out areas that require careful attention, helps you make correct algorithmic and keying material choices, and provides plenty of code examples showing correct and incorrect usages.

Views: 1430
Java

This video explains the Symmetric Key Encryption. For code refer http://www.java-redefined.com/2013/08/symmetric-key-encryption-decryption.html

Views: 480
Java Developer

An animated attempt of explaining the Playfair cipher. This tutorial includes rules of the cipher followed by an example to clear things up. This was a part of my final year project to create a learning aid. I decided to upload this so the animation won't go to waste. All feedbacks welcome.
Special thanks to Olivia Beck for creating the background image

Views: 153710
Kenny Luminko

Both Symmetric and Asymmetric key method can be used to secure message. First the message is encrypted with a symmetric key and then before sending the key to other party the key itself is encrypted with other parties public key. The other party on receiving the encrypted message and encrypted key, first decrypts the key with private key and than decrypts the message by using the decrypted key.
To know more about Java security read http://www.java-redefined.com/2013/08/java-security.html

Views: 580
Java Developer

In public key encryption, two different keys are used to encrypt and decrypt data.One is the public key and other is the private key. These two keys are mathematically related. They come as a pairs.
The public key encryption is also called asymmetric key encryption because two different keys are used.
Public key algorithm is used for different purpose from private key algorithm. It is used for verification and authentication.
In this video, I will use an example to demonstrate how to use public key.
Playlist: Basic Cryptography
https://www.youtube.com/watch?v=vk3py9M2IfE&list=PLSNNzog5eyduN6o4e6AKFHekbH5-37BdV
Advanced Cryptography:
https://www.youtube.com/watch?v=TmA2QWSLSPg&list=PLSNNzog5eydtwsdT__t5WtRgvpfMzpTc7
Please leave comments, questions and
please subscribe!

Views: 14969
Sunny Classroom

DES algorithm follows the Feistel Structure
Most of the Block cipher algorithms follows Feistel Structure
BLOCK SIZE - 64 bits Plain Text
No. of Rounds - 16 Rounds
Key Size - 64 bits
Sub Key Size - 48 bits
No. of Sub Keys - 16 Sub Keys
Cipher Text - 64 bits

Views: 50080
Sundeep Saradhi Kanthety

A beginner's guide to Transposition Ciphers (Encryption/Decryption).

Views: 64527
Daniel Rees

Describes the AES algorithm and its working as an overview

Views: 3277
Natarajan Meghanathan

This video will explain you in detail how caesar cipher encryption and decryption technique works.
This video includes solved example for caesar cipher encryption and decryption algorithm on whiteboard.
I had explained in detail about difficulties student might face while solving example related to caesar cipher in their examination.
More videos about encryption algorithms, computer tips and tricks, ethical hacking are coming very soon so share this video with your friends.
Subscribe to my youtube channel so that you can know when I upload any new video.
See you all very soon in next video, have great days ahead.
Thanks for watching my video.
#caesar #encryption #decryption

Views: 12942
SR COMPUTER EDUCATION

The JavaTM Cryptography Extension (JCE) provides a framework and implementations for encryption, key generation and key agreement, and Message Authentication Code (MAC) algorithms. Support for encryption includes symmetric, asymmetric, block, and stream ciphers. The software also supports secure streams and sealed objects.
The author of this clip is a student Jovan Jovanovic, University Singidunum.

Views: 2344
Saša Adamović

***NEW PROJECT*** Mini Lunchbox Arcade -https://www.youtube.com/watch?v=h8nhqowESKg --~--
This video lays out the steps for creating a very simple encryption and decryption program using free tools. The programming language we will be using is VB Script. See if you can decrypt this text:
wkjlue#vnrro#huxwxi#uxr\
You can find all the code for this program as well as an alternative for Apple computers at the project page:
http://www.tinkernut.com/archives/4193

Views: 94564
Tinkernut

Author: Jeremy Druin
Twitter: @webpwnized
Description: A light introduction to using OpenSSL to symmetrically encrypt text. The AES cipher is used in the sample with a 256 key, a salt and cipher block chaining mode. The sample is decrypted as well. Encryption theory is not discussed. This is only a practical exercise in performing symmetric encryption. Thank you for watching. Please support this channel. Up vote, subscribe or even donate by clicking "Support" at https://www.youtube.com/user/webpwnized!

Views: 1650
webpwnized

Symmetric Key Encryption and Decryption

Views: 12
Cryptography & Cyber Security Solutions

RSA Public Key Encryption Algorithm (cryptography). How & why it works. Introduces Euler's Theorem, Euler's Phi function, prime factorization, modular exponentiation & time complexity.
Link to factoring graph: http://www.khanacademy.org/labs/explorations/time-complexity

Views: 482275
Art of the Problem

In this screencast, Jon Andrews from Redport Information Assurance explains the step by step process in creating a symmetric key in order to encrypt and decrypt messages.

Views: 2406
Redport Information Assurance

Java Code for RSA Encryption and Decryption

Views: 18113
Natarajan Meghanathan

Our site: http://teamrio.blogspot.com/
In this video, Josh and Derek introduce the basic concepts behind private key encryption (more commonly known as symmetric key encryption to reduce confusion with components of the private key encryption method).

Views: 10695
Derek May-West

Example of Symmetric and Asymmetric Cryptography key Generation Encryption and Decryption

Views: 27
Cryptography & Cyber Security Solutions

Today we'll begin looking at the most widely used data encryption in the world, the AES Encryption Algorithm!
It's a symmetric key encryption algorithm. It scrambles data so you can securely store sensitive information on drives or USB's or transfer data over a network.
Over the course of the next videos in this series, we'll drill down and examine exactly how the algorithm works. I hope to present it in such a way that you could encrypt data with a pen and paper!
Become a patron and support What's a Creel programming vids on Patreon:
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Full version of Intergalactic Memory:
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www.facebook.com/pages/WhatsaCreel/167732956665435

Views: 38980
What's a Creel?

Understand the basics of cryptography and the concept of symmetric or private key and asymmetric or public key cryptography. Also, a simple example of how cryptography is applied in web browsers.
Link to "Applications of Public Key Cryptography" video: https://www.youtube.com/watch?v=Uk1mjEpW33s

Views: 5357
Biz Sci Tech

Views: 5429
Telusko Learnings

Diffie Hellman Key Exchange in Hindi for Symmetric Key Encryption System – With Example
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Views: 22324
Easy Engineering Classes

Hi guys we will learn in this tutorial series about the basics of cryptography and how to implement it in java.
We will start with hashing to encryption and then to encoding.
In hashing we will be using SHA-1, in ecryption we will focus on AES-128 and for encoding we will use Apache's Base64 encoder and decoder.
Here we will implement the ECB encryption AES 128 algo in Java and see how it works.

Views: 346
Code Digest With MrWallet

PlayFair Cipher in Hindi – Complete Algorithm with Example
Like FB Page - https://www.facebook.com/Easy-Engineering-Classes-346838485669475/
Complete Data Structure Videos - https://www.youtube.com/playlist?list=PLV8vIYTIdSna11Vc54-abg33JtVZiiMfg
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Control System Complete Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnbvRNepz74GGafF-777qYw4

Views: 38684
Easy Engineering Classes

In this tutorial I will show you the most basic encryption/decryption program for AES (Advanced Encryption Standard) using PyCrypto and Python 3. Check out my website at www.thepyportal.com for my blog, source code, tutorials, and references. Oh and don't forget the lonely Like button up there!

Views: 22259
Zach King

I have made this Dynamic Encryption & Decryption program, to encrypt and decrypt text of any kind with a given password to calculate the encryption the password can even just be nothing.
Features:
- Dynamic Encryption & Decryption!
- Choose Your Own Unique Password!
This program is currently made of 227 lines of code.
The main music is a mix made by one of my friends.
- http://www.youtube.com/watch?v=X7Oxqr...
Intro Music: Atmosphere Music - Secret Robes
Music: ARalleProduction - Electro House Remix
If you are the owner of the track, please send me a private message via YouTube to delete the track except of contacting YouTube!
I will accept your decision and I will delete the track as soon as possible.
I would really appreciate that.

Views: 6527
Vallentin

https://8gwifi.org/CipherFunctions.jsp
Computer Security, Cryptography Advanced Encryption Standard AES,fips 197
The Advanced Encryption Standard (AES) specifies a FIPS-approved
cryptographic algorithm that can be used to protect electronic data. The AES algorithm is a symmetric block cipher that can encrypt (encipher) and decrypt (decipher) information. Encryption converts data to an unintelligible form called ciphertext; decrypting the ciphertext converts the data back into its original form, called plaintext.
The AES algorithm is capable of using cryptographic keys of 128, 192, and 256 bits to encrypt and decrypt data in blocks of 128 bits.
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Views: 138425
Zariga Tongy

visual C# Adding AES encryption to C# application Forms Application
encryption encrypt- decrypt with AES using C# Forms Application
Advanced Encryption Standard Rijndael cipher Forms Application
C# - Simple AES encryption using Visual C# cryptographic
encrypt my 128 bit string using AES encryption cryptography C#

Views: 44364
ProgrammingKnowledge

Hello Dosto
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Views: 69709
Technical Sagar

This lesson explains how to encrypt and decrypt a message using a transposition cipher.
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Views: 49380
Mathispower4u

Data Encryption and Decryption. Encryption is the process of translating plain text data (plaintext) into something that appears to be random and meaningless (ciphertext). Decryption is the process of converting ciphertext back to plaintext. To encrypt more than a small amount of data, symmetric encryption is used.
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atoz knowledge

Demonstration of using OpenSSL to create RSA public/private key pair, sign and encrypt messages using those keys and then decrypt and verify the received messages. Commands used: openssl. Created by Steven Gordon on 7 March 2012 at Sirindhorn International Institute of Technology, Thammasat University, Thailand.

Views: 55862
Steven Gordon

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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.