Method for securing access to mobile IP network

Telecommunications – Radiotelephone system – Security or fraud prevention

Reexamination Certificate

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Details

C455S436000, C455S432100, C380S281000, C380S282000, C380S045000

Reexamination Certificate

active

07577425

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.

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