Showing papers on "Block cipher published in 1985"

Crytanalysis of DES with a Reduced Number of Rounds: Sequences of Linear Factors in Block Ciphers

Abstract: A blockcipher is said to have a linear factor if, for all plaintexts and keys, there is a fixed non-empty set of key bits whose simultaneous complementation leaves the exclusive-or sum of a fixed non-empty set of ciphertext bits unchanged.

Method and device of increasing the execution speed of cipher feedback mode of the DES by an arbitrary multiplier

Abstract: In an encryption system comprising DES in a cipher feedback mode of k bits, a plain text bit stream is fed into n individual DES encryptors. The DES encryptor operates in parallel from a common input register containing cipher text bit streams so that the overall throughput of the system is increased approximately by a factor of n. If k=1 then the system is self-synchronizing.