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block cipher algorithm - Übersetzung nach russisch
![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.")
Definition
Wikipedia
In cryptography, a block cipher is a deterministic algorithm operating on fixed-length groups of bits, called blocks. Block ciphers 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. A block cipher uses blocks as an unvarying transformation.
Even a secure block cipher is suitable for the encryption of only a single block of data at a time, using a fixed key. A multitude of modes of operation has been designed to allow their repeated use in a secure way to achieve the security goals of confidentiality and authenticity. However, block ciphers may also feature as building blocks in other cryptographic protocols, such as universal hash functions and pseudorandom number generators.
