Abstract

: A new non-proprietary secret-key block-enciphering algorithm, SAFER K64 (for Secure And Fast Encryption Routine with a Key of length 64 bits) is described. The blocklength is 64 bits (8 bytes) and only byte operationsareati in the processes of encryption and decryption. New cryptographic features in SAFER K-64 include the use of an unorthodox linear transform, called thePseudo-Hadamard 00 to achieve the desired "diffusion" of small changes in the plaintext or thekey761 the resulting ciphertext and the use of additive key biases to eliminatetheate 35144 of "weak keys". The design principles of K-64 are explained and a program isgiven,-36800 with examples, to define the encryption algorithm precisely. 1. Introduction This paper describes a new block encryption algorithm called SAFER K-64 (for Secure And Fast Encryption Routine with a Key of length 64 bits) that the author recently developed for Cylink Corporation (Sunnyvale, CA, USA) asa1260-21800 cipher. SAFER K-64 is a byte-ori...

Citations

596	Communication Theory of Secrecy Systems - Shannon - 1949
105	Markov ciphers and differential cryptanalysis - Lai, Massey, et al.
1	Department of Commerce/National Bureau of Standards,FIPSar 46, Data Encryption Standard - S - 1977