Connected Identity for STIR

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Last updated 2018-09-06 (latest revision 2018-03-05)
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The SIP Identity header conveys cryptographic identity information about the originators of SIP requests. The Secure Telephone Identity Revisited (STIR) framework however provides no means for determining the identity of the called party in a traditional telephone calling scenario. This document updates prior guidance on the "connected identity" problem to reflect the changes to SIP Identity that accompanied STIR, and considers a revised problem space for connected identity as a means of detecting calls that have been retargeted to a party impersonating the intended destination.


Jon Peterson (
Chris Wendt (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)