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:
Aug. 18, 2009
Filed:
May. 15, 2002
Satomi Okazaki, Palo Alto, CA (US);
Atsushi Takeshita, Sunnyvale, CA (US);
Yiqun Yin, San Mateo, CA (US);
Aki Yokote, San Francisco, CA (US);
Satomi Okazaki, Palo Alto, CA (US);
Atsushi Takeshita, Sunnyvale, CA (US);
Yiqun Yin, San Mateo, CA (US);
Aki Yokote, San Francisco, CA (US);
NTT DOCOMO Inc., Tokyo, JP;
Abstract
Networks consist of administrative domains each including an administrative server and at least one mobility agent deployed therein. The mobility agents offer connectivity to a mobile node via Advertisement messages in a form verifiable by the mobile node. Each Advertisement message is signed by a private key of the advertising mobility agent and accompanied by a certificate that contains a public key of the advertising mobility agent and is signed by a private key of the administrative server of the advertising mobility agent. Thus, if the mobile node has the public key of the administrative server, it can authenticate the Advertisement message. If the mobile node does not have the public key, it requests the public key when it registers with the mobility agent. The public key of the administrative server is sent in a certificate signed by the private key of the administrative server ultimately responsible for authentication of the mobile node.