Cryptographic peer discovery, authentication, and authorization for on-path signaling
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United States of America Patent
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Mar 25, 2008
Grant Date -
Oct 26, 2006
app pub date -
Apr 26, 2005
filing date -
Apr 26, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A method is disclosed for cryptographic peer discovery, authentication, and authorization. According to one embodiment, a data packet, which is addressed to a destination device other than an intermediary network device, is intercepted at the intermediary network device. The data packet contains a request and a group identifier. A shared secret cryptographic key, which is mapped to the group identifier, is selected. A challenge is sent toward an upstream device from whence the data packet came. A response is received. A verification value is generated based on the cryptographic key and the challenge. It is determined whether the response matches the verification value. If the response matches the verification value, then it is determined whether the request is allowed by an authorization set that is mapped to the group identifier. If the request is allowed, then a policy of the intermediary network device is configured based on the request.
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