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:
Jul. 01, 2008
Filed:
Oct. 08, 2003
Masato Yamamichi, Kadoma, JP;
Yuichi Futa, Osaka, JP;
Motoji Ohmori, Hirakata, JP;
Makoto Tatebayashi, Takarazuka, JP;
Masato Yamamichi, Kadoma, JP;
Yuichi Futa, Osaka, JP;
Motoji Ohmori, Hirakata, JP;
Makoto Tatebayashi, Takarazuka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The present invention pertains to a transmission apparatus for generating an encrypted text by encrypting a plaintext, which includes a parameter storage unit for storing a random parameter (the number of terms whose coefficients indicate 1) adapted to an encryption key and an encryption apparatus and a decryption apparatus; an encryption unit for generating, from the plaintext, the encrypted text using the encryption key and the random parameter stored in the parameter storage unit, complying with an encryption algorithm based on the NTRU™ method; and a key updating unit for updating the random parameter stored in the parameter storage unit and the encryption key, as time passes.