Differentially 4-uniform permutations have emerged as a cornerstone in the design of secure substitution boxes (S-boxes) for modern block ciphers. These functions are characterised by their ability to ...
The arena of creating secure environments in the hardware and software industries is somewhat shrouded in mystery and misunderstanding. Certainly, some types of ciphers are relatively straightforward ...
Introduction to ciphers and substitution. Alice and Bob and Carl and Julius: terminology and Caesar Cipher ; The key to the matter: generalizing the Caesar Cipher ; Multiplicative ciphers ; Affine ...
Last week’s installment on columnar transposition ciphers described a formula for the underlying permutation for a CTC. If we assume that the number of columns being used divides the length of the ...
Introduction: A revolutionary cipher -- Cryptology before 1500: a bit of magic -- The black chambers: 1500-1776 -- Crypto goes to war: the American Revolution -- Crypto goes to war: the American Civil ...
Fort Huachuca, Az. -The business of solving codes and ciphers had been an active field in the U.S. government since World War I when Ralph Van Deman realized he needed a cipher bureau as part of his ...
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