Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); 3G security; Security architecture (V9.5.0; 3GPP TS 33.102 version 9.5.0 Release 9)
"This specification defines the security architecture@ i.e.@ the security features and the security mechanisms@ for the third generation mobile telecommunication system. A security feature is a service capability that meets one or several security requirements. The complete set of security features address the security requirements as they are defined in ""3G Security: Threats and Requirements"" (TS 21.133 [1]) and implement the security objectives and principles described in TS 33.120 [2]. A security mechanism is an element that is used to realise a security feature. All security features and security mechanisms taken together form the security architecture. An example of a security feature is user data confidentiality. A security mechanism that may be used to implement that feature is a stream cipher using a derived cipher key. This specification defines 3G security procedures performed within 3G capable networks (R99+)@ i.e. intra-UMTS and UMTS-GSM. As an example@ UMTS authentication is applicable to UMTS radio access as well as GSM radio access provided that the serving network node and the MS are UMTS capable. Interoperability with non-UMTS capable networks (R98-) is also covered."