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Mobile Authentication for cellular and web prone introduces the reader into the sphere of safe conversation for cellular purposes, together with safe internet looking with a telephone or workstation, unmarried Sign-On (SSO), cellular broadcast content material defense, safe situation prone, and so forth. The booklet discusses the universal Authentication structure (GAA) of the cellular standardization physique third iteration Partnership undertaking (3GPP) and its American counterpart 3GPP2 in complete aspect and with all versions. It explains using GAA through numerous standardization our bodies and standardized purposes, and in addition appears at a couple of non-standardized ones, equivalent to safe distant login to firm setting and card personalization.

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Example text

For example, if a protocol supports username/password-based authentication scheme, GAA can be plugged in and used there almost directly. , (U)SIM cards) in different deployment scenarios and, in particular, make life easier for the users by not requiring to remember a large range of username/password combinations. Instead of remembering passwords, users are able to reuse their cellular authentication in a secure and automated manner. Therefore, the Ua reference point has not been selected to use one single protocol.

3. The difference between these variants results from the underlying security architecture. 3 Authentication In this phase, the key generated in the bootstrapping run are actually used for authentication. , between the UE and the BSF, can be any kind of protocol. Below is a generic message sequence flow on how application-specific GAA key (Ks_NAF) is used for authentication purposes. ) Bootstrapping session data Zh handler NAF Library Service Application Bootstrap. logic BSF NAF GBA Module USIM UE 1.

The GAA functionality can be split in two distinct phases: GAA bootstrapping and GAA authentication. First, the generation of the keys and then later on the usage of those. In more technical terms, we have: • • GAA bootstrapping, during which the UE, the BSF and the HSS work together to establish a shared secret (GAA master session key) utilizing reference points Ub between terminal and BSF and Zh between BSF and HSS (with potential detour using the SLF to find the right HSS). GAA authentication, during which the UE, a NAF and the BSF work together to mutually authenticate the subscriber using the application in the UE, and the service running a server with NAF functionality using reference point Ua between the terminal and the NAF, and Zn between the NAF and the BSF.

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