ビデオ	担当者：森川 博之・山口 英・村井 純 第02回 10/18/2000

C.E. Shannon

• “A mathematical theory of communication”, BSTJ, 1948.
  
  
• “Communication theory of secrecy systems”, BSTJ, 1949.
  
  
• Mathematical model
  
  
  • Makes clear what the mathematical assumptions are for a ciphertext-only attack on a secrecy system