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:
Mar. 06, 2007
Filed:
Jun. 01, 1999
Shiho Moriai, Yokohama, JP;
Kazumaro Aoki, Yokohama, JP;
Masayuki Kanda, Yokohama, JP;
Youichi Takashima, Yokohama, JP;
Kazuo Ohta, Zushi, JP;
Shiho Moriai, Yokohama, JP;
Kazumaro Aoki, Yokohama, JP;
Masayuki Kanda, Yokohama, JP;
Youichi Takashima, Yokohama, JP;
Kazuo Ohta, Zushi, JP;
Abstract
In the evaluation of the randomness of an S-box, measures of resistance to higher order cryptanalysis, interpolation cryptanalysis, partitioning cryptanalysis and differential-linear cryptanalysis and necessary conditions for those measures to have resistance to each cryptanalysis are set, then for functions as candidates for the S-box, it is evaluated whether one or all of the conditions are satisfied, and those of the candidate functions for which one or all of the conditions are satisfied are selected as required. It is also possible to further evaluate the resistance of such selected functions to at least one of differential cryptanalysis and linear cryptanalysis and select those of the candidate functions which are resistant to at least one of the cryptanalyses as required.