31 series - Cu interface protocols, UICC and USIM
The 31 series covers the UICC and the applications that run there.
The UICC stores information associated with the user and the network operator, such as phone books, authentication keys and operator-specific applications. It evolved from the GSM SIM card, but unlike in GSM, there's a clear distinction between the hardware (the UICC) and the applications that run there (such as the USIM).
The specifications can be divided into four broad areas:
Many aspects of the UICC have been generalised as part of a parallel ETSI project, to define a smart card platform (SCP) that can be used by applications other than telecommunications. Because of this, some of the 31 series specifications just contain references and amendments to the corresponding ETSI SCP specifications. The relevant ETSI specifications are listed on the following pages, and can be downloaded here.
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