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:
Dec. 13, 2005
Filed:
Dec. 01, 2000
Toshio Kuroiwa, Yokohama, JP;
Takayuki Sugahara, Yokosuka, JP;
Wataru Inoha, Yokosuka, JP;
Kenjiro Ueda, Yokosuka, JP;
Seiji Higurashi, Tokyo, JP;
Toshio Kuroiwa, Yokohama, JP;
Takayuki Sugahara, Yokosuka, JP;
Wataru Inoha, Yokosuka, JP;
Kenjiro Ueda, Yokosuka, JP;
Seiji Higurashi, Tokyo, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A first-key signal representative of a first key is generated from first-key base information being a base of the first key. Contents information is encrypted into encryption-resultant contents information in response to the first-key signal. A second-key signal representative of a second key is generated on the basis of initial-value information of a given initial value according to a predetermined key generation algorithm. The first-key base information is encrypted into encryption-resultant first-key base information in response to the second-key signal. The encryption-resultant contents information, the encryption-resultant first-key base information, the initial-value information, and algorithm identification information for identifying the predetermined key generation algorithm are transmitted or recorded.