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Substitution cipher (17650 bytes) 1: ...he extended list of ciphertext symbols. Examples are Caesar ciphers (such as ROT13) and the ...
4: ...ated by first writing out a keyword, then all the remaining letters.
http://www.newwikisite.com/articles/s/u/Substitution_cipher.html
Vigenère (8319 bytes) 1: ... the keyword. It is a simplified version of the more general polyalphabetic substitution cypher, i...
3: ...in their applications which are essentially Vigenère ciphers, only to have them broken by the first cr...
http://www.newwikisite.com/articles/v/i/Vigenère.html