Presence service; Security
The present document is the Stage 2 specification for the security requirements, security architecture, security features and security mechanisms for the Presence Service, which includes the elements necessary to realise the requirements in TS 22.141 [2] and TS 23.141 [3]. As far as SIP-based procedures are concerned, this specification refers to TS 33.203 [4]. The main content of this specification is the security for the Ut reference point, which is HTTP–based, as applied in presence services.
The present document includes information applicable to network operators, service providers and manufacturers.