Converged Application Server supports the P-Asserted-Identity SIP header as described in RFC 3325. This functionality automatically logs in using credentials specified in the P-Asserted-Identity header when they are received from a trusted host. When combined with the privacy header, P-Asserted-Identity also determines whether the message can be forwarded to trusted and non-trusted hosts.

Converged Application Server also supports identity assertion using the Identity and Identity-Info headers as described in RFC 4474.

Both identity assertion mechanisms require that you configure an appropriate security provider with Converged Application Server. See "Overview of SIP Servlet Identity Assertion Mechanisms" for more information.