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Что (кто) такое block cipher - определение
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Block cipher
![The development of the [[boomerang attack]] enabled [[differential cryptanalysis]] techniques to be applied to many ciphers that had previously been deemed secure against differential attacks](https://commons.wikimedia.org/wiki/Special:FilePath/Attaque boomerang.png?width=200 "The development of the [[boomerang attack]] enabled [[differential cryptanalysis]] techniques to be applied to many ciphers that had previously been deemed secure against differential attacks")
![Many block ciphers, such as DES and Blowfish utilize structures known as ''[[Feistel cipher]]s''](https://commons.wikimedia.org/wiki/Special:FilePath/Feistel cipher diagram en.svg?width=200 "Many block ciphers, such as DES and Blowfish utilize structures known as ''[[Feistel cipher]]s''")
![IDEA]].](https://commons.wikimedia.org/wiki/Special:FilePath/Lai Massey scheme diagram en.svg?width=200 "IDEA]].")
![Insecure encryption of an image as a result of [[electronic codebook]] (ECB) mode encoding.](https://commons.wikimedia.org/wiki/Special:FilePath/Tux ecb.jpg?width=200 "Insecure encryption of an image as a result of [[electronic codebook]] (ECB) mode encoding.")
CIPHER THAT WORKS ON FIXED-SIZE BLOCKS OF BITS
Codebook algorithm; Block ciphers; Block cyphers; Block crypto; Block cypher; Symmetric block cipher; Block Cipher; Tweakable block cipher; ARX cipher
In cryptography, a block cipher is a deterministic algorithm operating on fixed-length groups of bits, called blocks. They are specified elementary components in the design of many cryptographic protocols and are widely used to encrypt large amounts of data, including in data exchange protocols. It uses blocks as an unvarying transformation.
Block cipher mode of operation
ALGORITHM THAT USES A BLOCK CIPHER TO PROVIDE AN INFORMATION SERVICE SUCH AS CONFIDENTIALITY OR AUTHENTICITY
Electronic codebook; Cipher-block chaining; Cipher feedback; Output feedback; Cipher Block Chaining; Counter mode; Modes of operation; CTR mode; Output feedback mode; Cipher block chaining; Block ciphers mode of operation; Electronic code book; CBC mode of operation; Block cipher modes; Block cipher mode; Cipher mode; Cipher modes; Enciphering scheme; Ciphertext feedback mode; Encryption mode; Mode of operation; ECB mode; OFB mode; Block cipher modes of operation; Mode of operation\; Block cypher mode; CBC mode; CFB mode; Cipher feedback mode; Electronic Codebook; AES-CBC; AES-CTR
In cryptography, a block cipher mode of operation is an algorithm that uses a block cipher to provide information security such as confidentiality or authenticity.
GOST (block cipher)
SOVIET/RUSSIAN NATIONAL STANDARD BLOCK CIPHER
GOST 28147-89; GOST block cipher; GOST89
The GOST block cipher (Magma), defined in the standard GOST 28147-89 (RFC 5830), is a Soviet and Russian government standard symmetric key block cipher with a block size of 64 bits. The original standard, published in 1989, did not give the cipher any name, but the most recent revision of the standard, GOST R 34.
Iraqi block cipher
In cryptography, the Iraqi block cipher was a block cipher published in C source code form by anonymous FTP upload around July 1999, and widely distributed on Usenet. It is a five round unbalanced Feistel cipher operating on a 256 bit block with a 160 bit key.
XOR cipher
ENCRYPTION BY SIMPLE EXCLUSIVE-OR LOGIC OPERATIONS
Simple XOR Cipher; Simple XOR cipher; XOR encryption; Xor encryption; Xor cipher
In cryptography, the simple XOR cipher is a type of additive cipher, an encryption algorithm that operates according to the principles:
Caesar cipher
![The Caesar cipher is named for [[Julius Caesar]], who used an alphabet where decrypting would shift three letters to the left.](https://commons.wikimedia.org/wiki/Special:FilePath/Bust of Julius Caesar from History of the World (1902).png?width=200 "The Caesar cipher is named for [[Julius Caesar]], who used an alphabet where decrypting would shift three letters to the left.")
SIMPLE AND WIDELY KNOWN ENCRYPTION TECHNIQUE
Shift cipher; Caesar shift cipher; Caesar cypher; Caeser cipher; ROT3; Caesar shift; Caesarean cipher; Caesar Cipher; Rotation cipher; Caesar-shift substitution cipher; Caesar encryption; Caesar’s cipher; Caesar Code; Caesar code; Caesar's cipher; Caesar's code; Caesar's Cipher; Caesar Shift; Caesarian cipher; Ceaserian cipher; Ceasarian cipher; Ceserian cipher; Cesarian cipher; Caesar's method; Caesar method; Shift cypher; Ceasar cypher; Ceasar Cipher
In cryptography, a Caesar cipher, also known as Caesar's cipher, the shift cipher, Caesar's code or Caesar shift, is one of the simplest and most widely known encryption techniques. It is a type of substitution cipher in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet.
Pigpen cipher
TYPE OF SUBSTITUTION CIPHER
Pigpen Cipher; Masonic cipher; Freemason's cipher; Pigpen code; Mason cipher; Pigpen cypher; Templar cipher; Rosicrucian cipher; Rosicrucian Cipher; Newark cipher; Newark Cipher; Elian Script
The pigpen cipher (alternatively referred to as the masonic cipher, Freemason's cipher, Napoleon cipher, and tic-tac-toe cipher)Barker, p. 40Wrixon, p.
Vigenère cipher
![Confederacy]]'s [[cipher disk]] used in the [[American Civil War]] on display in the [[National Cryptologic Museum]]](https://commons.wikimedia.org/wiki/Special:FilePath/Confederate cipher disk.png?width=200 "Confederacy]]'s [[cipher disk]] used in the [[American Civil War]] on display in the [[National Cryptologic Museum]]")
![Confederate cipher wheel, captured at the surrender of [[Mobile, Alabama]], in May 1865 – [[National Cryptologic Museum]]](https://commons.wikimedia.org/wiki/Special:FilePath/Confederate cipher wheel (Vigenere), captured at the surrender of Mobile, Alabama, in May 1865 - National Cryptologic Museum - DSC07710.JPG?width=200 "Confederate cipher wheel, captured at the surrender of [[Mobile, Alabama]], in May 1865 – [[National Cryptologic Museum]]")
![The Vigenère square or Vigenère table, also known as the ''[[tabula recta]]'', can be used for encryption and decryption.](https://commons.wikimedia.org/wiki/Special:FilePath/Vigenère square shading.svg?width=200 "The Vigenère square or Vigenère table, also known as the ''[[tabula recta]]'', can be used for encryption and decryption.")
SIMPLE TYPE OF POLYALPHABETIC ENCRYPTION SYSTEM
Vigenère Cipher; Le chiffre indéchiffrable; The unbreakable cypher; Le chifffre indechiffrable; Vigenere cipher; Vigenere table; Vigenere Table; Vigenère table; Vigenère Table; Vigenère ciphers; Vigenére cipher; Vigenère square; Vigenere Cipher; Le chiffre indechiffrable; Vigenere square; Vigenere cypher; Vigenere ciphers; Gronsfeld cipher; Vigenère cypher; Kappa test; Vignere cipher; Vigenère's cipher; Bellaso cipher; Bellaso's cipher
The Vigenère cipher () is a method of encrypting alphabetic text by using a series of interwoven Caesar ciphers, based on the letters of a keyword. It employs a form of polyalphabetic substitution.
Rail fence cipher
TYPE OF TRANSPOSITION CIPHER
Rail fence; Rail-Fence Cipher; Railfence; Railfence cipher; Zigzag cipher; Rail Fence Cipher
The rail fence cipher (also called a zigzag cipher) is a classical type of transposition cipher. It derives its name from the manner in which encryption is performed, in analogy to a fence built with horizontal rails.
ADFGVX cipher
TYPE OF CIPHER USED IN WORLD WAR I
ADFGVX; ADFGX cipher; ADFGX
In cryptography, the ADFGVX cipher was a manually applied field cipher used by the Imperial German Army during World War I. It was used to transmit messages secretly using wireless telegraphy.
