Its simplicity and its cryptographic strength compared to simple substitution and Vigènere (a polyalphabetic substitution cipher) made it an immediate success as a field cipher, used by the ...

The lines were encrypted with a polyalphabetic substitution cipher using six symbols for each English letter. A short sample of the original text appears in the illustration.

Puzzle #226: Can you decipher the substitution cipher? Can you solve this week’s logic puzzle, On reflection? Plus the answer to puzzle #225 ...

Cold War Russian cipher may finally be solved Date: February 2, 2016 Source: Taylor & Francis Summary: The Soviet VIC cipher used in the early 1950s, long known for being complex and secure, may ...

Some ciphers have simple keys, others, complex ones. The key for a cipher used by Augustus Caesar, some 2,000 years ago, was simple enough: The receiver just had to shift the alphabet one position.