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:
Sep. 19, 2006
Filed:
Feb. 16, 2001
Soichi Furuya, Fujisawa, JP;
Kazuo Takaragi, Ebina, JP;
Hiroyuki Kurumatani, Yokohama, JP;
Masashi Takahashi, Narashino, JP;
Kunihiko Miyazaki, Yohokama, JP;
Hisayoshi Sato, Yokohama, JP;
Dai Watanabe, Kamakura, JP;
Soichi Furuya, Fujisawa, JP;
Kazuo Takaragi, Ebina, JP;
Hiroyuki Kurumatani, Yokohama, JP;
Masashi Takahashi, Narashino, JP;
Kunihiko Miyazaki, Yohokama, JP;
Hisayoshi Sato, Yokohama, JP;
Dai Watanabe, Kamakura, JP;
Tokyo, Japan, Tokyo, JP;
Abstract
A symmetric-key cryptographic technique capable of realizing both high-speed cryptographic processing having a high degree of parallelism, and alteration detection. The invention includes dividing plaintext composed of redundancy data and a message to generate plaintext blocks each having a predetermined length, generating a random number sequence based on a secret key, generating a random number block corresponding to one of the plaintext blocks from the random number sequence, outputting a feedback value obtained as a result of operation on the one plaintext blocks and the random number block, the feedback value being fed back for using in the operation on another plaintext blocks, and performing an encryption operation using the one plaintext blocks, random number block, and feedback value.