Handling of identities in a trust domain of an IP network

Details Handling of identities in a trust domain of an IP network Handling of identities in a trust domain of an IP network

2005-05-03

2011-10-25

Shah, Chirag G (Department: 2477)

Multiplex communications

Pathfinding or routing

Combined circuit switching and packet switching

C370S395300

Reexamination Certificate

active

08045540

ABSTRACT:
A method for handling user identity and privacy, wherein a first Session Initiation Protocol (SIP) proxy is about to forward a SIP request to a next SIP proxy includes the step of determining whether Transport Layer Security (TLS) is supported in a hop to a next SIP proxy. When TLS is supported, the method includes establishing a TLS connection to the hop to the next SIP proxy, requesting a certificate from the next SIP proxy, receiving the certificate, verifying the certificate and trustworthiness of a network of the next SIP proxy and retaining identity information when the certificate and the trustworthiness of the network is verified. When TLS is not supported, or when the certificate is not verified, or when the trustworthiness of the network is not verified, the identity information is removed. Thereafter, the SIP request is forwarded over the TLS connection.

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IETF RFC 3602 (2003), “The AES-CBC Cipher Algorithm and Its Use with IPsec,” Sep. 2003, S. Frankel et. al.
IETF RFC 3263 (2002), “Session Initiation Protocol (SIP): Locating SIP Servers,” Jun. 2002, J. Rosenberg et. al.
IETF RFC 3261 (2002), “SIP: Session Initiation Protocol,” Jun. 2002, J. Rosenberg et. al.
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Jennings, et al., “Private Extensions to the Session Initiation Protocol (SIP) for Asserted Identity within Trusted Networks”, RFC 3325, Nov. 2002.
J. Peterson, “A Privacy Mechanism for the Session Initiation Protocol (SIP)”, RFC 3323, Nov. 2002.

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