About HAYASHI AKIRA
About 電子情報通信学会技術研究報告
About density
About cryptogram
About computer security
About data protection
About cryptography key
About decoding
About computer simulation
About cyberattack
About security attack
About decipher
About computer experiment
About low density
About secret key
About Code theory
About Data protection
About 低密度
About ナップザック暗号