General principles – Block Ciphers and Their Modes of Operation

• Kevanna Brown
• 05/15/202208/31/2024
• 0

14.2 General principles A block cipher is an encryption function eK that maps plaintext blocks of fixed size b onto ciphertext blocks of the same size b: As indicated by the subscript k, a block cipher is a symmetric algorithm, taking a shared key k ∈𝒦 as a parameter, where 𝒦 is the keyspace (see…