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System and method for determining trust for SIP messages

  • US 8,694,660 B2
  • Filed: 07/09/2012
  • Issued: 04/08/2014
  • Est. Priority Date: 04/13/2009
  • Status: Active Grant
First Claim
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1. A method in a user agent (UA), the method comprising:

  • sending, by the UA, a Session Initiation Protocol (SIP) REGISTER request;

    receiving, at the UA, a SIP 200 OK response message to the SIP REGISTER request, the SIP 200 OK response message having a first header field that includes an identifier associated with a trusted network node;

    receiving, at the UA, a SIP message having a second header field for indicating a Uniform Resource Identifier (URI); and

    sending, by the UA, a SIP communication if the URI matches the identifier associated with the trusted network node.

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