The Shakespearean ciphers examined; an analysis of cryptographic systems used as evidence that some author other than William Shakespeare wrote the plays commonly attributed to him,

Eitemau Tebyg

• Codes and ciphers : Julius Caesar, the Enigma, and the internet /
  gan: Churchhouse, R. F.
  Cyhoeddwyd: (2002)
• Mathamatics of ciphers: number theory and RSA cryptography /
  gan: Countinho, S S
  Cyhoeddwyd: (1999)
• Mathematical ciphers : from Caesar to RSA /
  gan: Young, Anne L., 1946-
  Cyhoeddwyd: (2006)
• Cryptology classical and modern with maplets
  gan: Klima, Richard E
  Cyhoeddwyd: (2012)
• Cryptography and network security:principles and practices
  gan: Stallings, William
  Cyhoeddwyd: (2012)