sIP URI scheme
 | It has been suggested that this article be merged into Session Initiation Protocol#Network elements. (Discuss) Proposed since January 2012. |
The SIPS URI scheme adheres to the syntax of the SIP URI, although the scheme string is "sips" rather than "sip".
SIPS allows resources to specify that they should be reached securely. It mandates that each hop over which the request is forwarded up to the target domain must be secured with TLS. The last hop from the proxy of the target domain to the user agent has to be secured according to local policies.
SIPS protects against attackers which try to listen on the signaling link. It does not provide real end-to-end security, since encryption is only hop-by-hop and every single intermediate proxy has to be trusted.
See also
- Session Initiation Protocol
- Security Descriptions for SDP
- Mikey key exchange method
- ZRTP end-to-end key exchange proposal
External links
- The SIPS URI scheme is described in RFC 3261