Anzeige
Erschienen in:
2016 | OriginalPaper | Buchkapitel
Block Ciphers and Modes of Operation
verfasst von : Nigel P. Smart
Erschienen in: Cryptography Made Simple
Aktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.
Wählen Sie Textabschnitte aus um mit Künstlicher Intelligenz passenden Patente zu finden. powered by
Markieren Sie Textabschnitte, um KI-gestützt weitere passende Inhalte zu finden. powered by
The basic description of a block cipher is shown in Figure 13.1. Block ciphers operate on blocks of plaintext one at a time to produce blocks of ciphertext. The block of plaintext and the block of ciphertext are assumed to be of the same size, e.g. a block of n bits. Every string of n bits in the domain should map to a string of n bits in the codomain, and every string of n bits in the codomain should result from the application of the function to a string in the domain. This means that for a fixed key a block cipher is bijective and hence is a permutation.