Cipher generating device, cipher decoding device, cipher...

Details Cipher generating device, cipher decoding device, cipher... Cipher generating device, cipher decoding device, cipher...

2007-02-06

2007-02-06

Sheikh, Ayaz (Department: 2131)

Cryptography

Communication system using cryptography

Symmetric key cryptography

C380S028000, C380S282000, C380S044000

Reexamination Certificate

active

10290203

ABSTRACT:
Encryption, having sufficient concealment, is carried out through chaotic computation using integer arithmetic. There is provided a cipher generating device, for carrying out computation, for plain text information, to apply chaotic noise obtained using a mapping function for generating chaotic noise based on encrypted key data, to generate a cipher. This cipher generation device comprises parameter generation means102for generating a parameter string for use in chaotic computation based on the key data, chaotic noise generating means103for carrying out chaotic computation using the parameter string generated by the parameter generating means102and obtaining the chaotic noise, and scheduling means104for carrying out scheduling of the parameter string so as to cause a change in the parameter string every fixed cycle the parameter string is used in the chaotic computation.

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