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. 08, 2014
Filed:
Feb. 07, 2008
Kei Karasawa, Tokyo, JP;
Masahisa Kawashima, Tokyo, JP;
Yukio Tsuruoka, Tokyo, JP;
Kenji Takahashi, Tokyo, JP;
Shingo Orihara, Tokyo, JP;
Kei Karasawa, Tokyo, JP;
Masahisa Kawashima, Tokyo, JP;
Yukio Tsuruoka, Tokyo, JP;
Kenji Takahashi, Tokyo, JP;
Shingo Orihara, Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
A terminal devicetransmits a certificate issue request including a communication ID thereof and a sub ID to a certificate issuing devicevia a NW(a first network). The certificate issuing deviceinquires of a communication ID (identifier) checking devicewhether or not the communication ID included in the certificate issue request is in use or not and inquires of a communication ID/sub ID checking devicewhether or not the communication ID and the sub ID are associated with each other. If both the check results are OK, the certificate issuing devicegenerates a certificate including the ID of the certificate issuing device, the communication ID, the sub ID and a validity period and transmits the certificate to the terminal device. In this way, a certificate with a short validity period can be issued only based on the access to the NWusing the communication ID and the sub ID.