Data encryption standard
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DES is a widely-used method of data encryption that uses a private key chosen from 72 quadrillion possible keys to encrypt 64-bit blocks of data using 16 rounds of operations. While DES is considered strong encryption, some use triple DES for additional security. In 1997, a cooperative effort of 14,000 computers broke a DES encrypted message by trying 18 quadrillion keys out of the 72 quadrillion possibilities. DES originated at IBM in 1977 and was adopted by the U.S. government but export was restricted due to security concerns, though free software is now widely available. NIST will not recertify DES and is accepting submissions for its AES replacement standard.
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Week 12 slideHaruki0428 Encryption works by using keys to scramble data so that it can only be unscrambled by those with the correct key. There are two main types: symmetric key encryption which uses the same key to encrypt and decrypt but requires secure distribution of keys, and public key encryption which uses separate public and private keys allowing encryption by anyone but decryption only by the private key holder. Popular implementations of public key encryption include SSL and TLS which enable secure internet communications.
s117
s117s1170034 This document provides an overview of encryption and authentication methods. It discusses symmetric key encryption where both computers share a secret key, and public key encryption which uses digital certificates from a certificate authority to allow secure communication without pre-shared keys. Popular implementations of public key encryption include SSL and TLS, which use certificates to verify identities and encrypt data, then employ symmetric encryption for efficiency. Hashing algorithms are also discussed, which create unique values from input data to serve as keys in an irreversible way, ensuring security.
Encryption Data Measurement and Data Security of Hybrid AES and RSA Algorithm
Encryption Data Measurement and Data Security of Hybrid AES and RSA Algorithmijtsrd This document summarizes a research paper that proposes a hybrid encryption system using both the AES and RSA algorithms. The system first encrypts a data file with AES, using a randomly generated key. It then encrypts the AES key with RSA using the receiver's public key. These two encrypted files are combined and sent to the receiver. The receiver separates the files and decrypts the AES key with their private RSA key. Then the original data file is decrypted with AES using the retrieved key. The paper analyzes the encryption methods, provides an overview of how the system works, and evaluates its performance compared to using just AES or RSA alone. It finds that the combined system has faster encryption times than just using RSA.
Encryption techniques 
Encryption techniques ShrikantSharma86 Encryption is a process that converts plain text into ciphertext through the use of cryptographic algorithms and encryption keys. There are two main types of encryption: symmetric encryption which uses the same key for encryption and decryption, and asymmetric encryption which uses a public key for encryption and a private key for decryption. Common symmetric encryption algorithms discussed include DES, Triple DES, AES, Blowfish and Twofish. Asymmetric algorithms include RSA. Other algorithms mentioned are IDEA, MD5, and FPE. The document also discusses how encryption keys are used and changed in Magento.
Advanced Encryption Standard (AES) with Dynamic Substitution Box
Advanced Encryption Standard (AES) with Dynamic Substitution BoxHardik Manocha AES algorithm has been stated as secure against any attack but increasing fast computing is making hackers to develop the cracks for AES as well. Therefore to further increase the security of AES, i tried to replace Standard static and fixed Substitution Box with a dynamic S Box. Dynamicity is brought with the help of Input key. Static S box is altered using the input key and the new generated s box is used for encryption. Reverse steps goes for Decryption. Presently, working on to test this design against Side Channel attacks and would publish the results here.
Network security jeni corrected 1
Network security jeni corrected 1NIVEDHINIMANIVANNAN The document summarizes the Data Encryption Standard (DES) cryptographic algorithm. It was issued in 1977 by the National Bureau of Standards as the Federal Information Processing Standard for data encryption. DES uses a 56-bit key to encrypt 64-bit blocks of plaintext into ciphertext using 16 rounds of permutations and substitutions. While the algorithm and its use of 56-bit keys were once considered secure, concerns were later raised about weaknesses in the algorithm's substitution tables and the possibility of timing attacks on implementations.
How encryption works
How encryption worksMariko Saitoh Encryption works by using algorithms and keys to secure digital information during transmission. Symmetric-key encryption uses the same secret key between two computers, while public-key encryption uses separate public and private keys. A popular implementation of public-key encryption is Secure Sockets Layer (SSL) and its successor Transport Layer Security (TLS), which allow for secure transmission of sensitive information on the internet through the use of encryption during online transactions.
Data encryption
Data encryptionBalvant Biradar Encryption is a technique for transforming information on a computer in such a way that it becomes not understandable.
Cryptography 
Cryptography Shankar Ghorpade Cryptography involves encrypting data to hide its meaning. Encryption converts plain text into unintelligible cipher text using an algorithm and a key, while decryption reconverts the cipher text into plain text. Symmetric key cryptography uses the same key for encryption and decryption, while asymmetric key cryptography uses different public and private keys. AES is a modern block cipher standard that uses 128, 192, or 256-bit keys and a 128-bit block size, providing stronger security than the older DES standard with its 56-bit key and 64-bit block size. AES encryption is considered very secure due to the huge number of possible keys.
Cryptography
CryptographyShankar Ghorpade Cryptography involves encrypting data to hide its meaning. Encryption converts plain text into unintelligible cipher text using an algorithm and a key, while decryption reconverts cipher text into plain text. Symmetric key cryptography uses the same key for encryption and decryption, while asymmetric key cryptography uses different public and private keys. Common symmetric algorithms are DES, which uses a 56-bit key, and the more secure AES, which allows 128-, 192-, or 256-bit keys and a larger 128-bit block size. AES is considered more secure than DES due to its larger key sizes and stronger algorithm.
Kadai1
Kadai1s1190105 Encryption works by using algorithms and keys to scramble sensitive information during transmission. Symmetric key encryption uses the same key to encrypt and decrypt, while public key encryption uses separate public and private keys. Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols make significant use of certificate authorities to verify identities and establish secure connections between devices on the internet. Hashing algorithms are also used to verify data integrity.
Ch12 Cryptography it-slideshares.blogspot.com
Ch12 Cryptography it-slideshares.blogspot.comphanleson The document describes the history and types of cryptography. It discusses symmetric and asymmetric cryptography algorithms such as DES, AES, RSA, and Diffie-Hellman. It also covers cryptanalysis techniques like brute force attacks and digital signatures. Public key infrastructure (PKI) uses digital certificates to authenticate users, while protocols like PGP, S/MIME, and PEM can encrypt email messages.
IMAGE SECURITY BY 3 DES.pdf
IMAGE SECURITY BY 3 DES.pdfDhamuKing1 This document discusses using Triple DES (Data Encryption Standard) to encrypt images for security. It begins with an introduction to the need for encrypting digital images. It then provides background on DES and how Triple DES works by applying the DES cipher algorithm three times with independent keys. The document outlines the Triple DES encryption and decryption process and references used in the project code, which is written in Python.
International Journal of Computational Engineering Research(IJCER) 
International Journal of Computational Engineering Research(IJCER) ijceronline International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
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Data encryption standard
- 1. Data Encryption Standard (DES) is a widely-used method of data encryption using a private (secret) key that was judged so difficult to break by the U.S. government that it was restricted for exportation to other countries. There are 72,000,000,000,000,000 (72 quadrillion) or more possible encryption keys that can be used. For each given message, thekey is chosen at random from among this enormous number of keys. Like other private key cryptographic methods, both the sender and the receiver must know and use the sameprivate key. DES applies a 56-bit key to each 64-bit block of data. The process can run in several LEARN MORE Data Privacy and Protection Email Security Guidelines, Encryption and Appliances Security modes and involves 16 rounds or operations. Although this is considered "strong" encryption, many companies use "triple DES", which applies three keys in succession. This is not to say that a DES-encrypted message cannot be "broken." Early in 1997, Rivest-Shamir-Adleman, owners of another encryption approach, offered a $10,000 reward for breaking a DES message. A cooperative effort on the Internet of over 14,000 computer users trying out various keys finally deciphered the message, discovering the key after running through only 18 quadrillion of the 72 quadrillion possible keys! Few messages sent today with DES encryption are likely to be subject to this kind of code-breaking effort. DES originated at IBM in 1977 and was adopted by the U.S. Department of Defense. It is specified in the ANSI X3.92 and X3.106 standards and in the Federal FIPS 46 and 81 standards. Concerned that the encryption algorithm could be used by unfriendly governments, the U.S. government has prevented export of the encryption software. However, free versions of the software are widely available on bulletin board services and Web sites. Since there is some concern that the encryption algorithm will remain relatively unbreakable, NIST has indicated DES will not be recertified as a standard and submissions for its replacement are being accepted. The next standard will be known as the Advanced Encryption Standard (AES).