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:
Nov. 23, 2010
Filed:
Jan. 27, 2006
Mitsuhiro Oikawa, Fujisawa, JP;
Yutaka Tagawa, Yokohama, JP;
Mitsuhiro Oikawa, Fujisawa, JP;
Yutaka Tagawa, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
To verify a qualification on a network without notifying verifier privacy information that can identify as a subject of a public key certificate while keeping safety of the public key infrastructure technology. An attribute certificate validation method wherein by preparing an environment in which only an attribute certificate validation device operated by a trusted third party can access a user's public key certificate, the verifier transmits attribute certificate and signed data received from a user having presented a qualification, to the attribute certificate validation device to thereby request the device to make a check to confirm authenticity of the holder of the attribute certificate, thereby preventing the public key certificate (particularly, privacy information contained in the public key certificate) of the user from being passed to the verifier.