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O que (quem) é S-1 block cipher - definição
S-1 block cipher
In cryptography, the S-1 block cipher was a block cipher posted in source code form on Usenet on 11 August 1995. Although incorrect security markings immediately indicated a hoax, there were several features of the code which suggested it might be leaked source code for the Skipjack cipher, which was still classified at the time.
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.
