Extension of Shannon's theory of ciphers based on Latin rectangles

ePrint Report: Extension of Shannon's theory of ciphers based on Latin rectangles

Karel BURDA

The paper extends Shannon's classical theory of ciphers. Here ciphers are modeled by Latin rectangles and their resistance to brute force attack is assessed through the valence of cryptograms. The valence of a cryptogram is defined as the number of all meaningful messages produced by decrypting the cryptogram with all possible keys. In this paper, the mean cryptogram valence of an arbitrary modern cipher with K …

attack brute ciphers cryptogram defined eprint report extension report theory valence