The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 06, 2007
Filed:
Nov. 08, 2002
Hidetoshi Okutomi, Kawasaki, JP;
Hidetoshi Okutomi, Kawasaki, JP;
Toshiba Information Systems (Japan) Corporation, Kawasaki, JP;
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 meansfor generating a parameter string for use in chaotic computation based on the key data, chaotic noise generating meansfor carrying out chaotic computation using the parameter string generated by the parameter generating meansand obtaining the chaotic noise, and scheduling meansfor 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.