33 series - Network access security
Network access security is a set of security features that provides users with secure access to 3G services. These security features include user identity confidentiality, mutual authentication, data confidentiality and data integrity protection.
TS 33.102 describes the features used for secure communication between the UE, UTRAN and core network. Similar features are used for communication with the IMS, while a third specification describes the case of network access using WLAN. TS 33.105 describes the cryptographic functions used for network access security: the actual algorithms are defined in the 35 series.
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