name: GSM ciphering key
full_form: GSM Ciphering Key
context: The purpose of the authentication procedure is twofold (see 3GPP TS 43.020 [13]): First to permit the network to check whether the identity provided by the mobile station is acceptable or not; Second to provide parameters enabling the mobile station to calculate a new GSM ciphering key. The cases where the authentication procedure should be used are defined in 3GPP TS 42.009 [5]. The authentication procedure is always initiated and controlled by the network. GSM authentication challenge shall be supported by a ME supporting GERAN or UTRAN. A GSM security context is established in the MS and the network when a GSM authentication challenge is performed in A/Gb mode or in Iu mode. However, in Iu mode the MS shall not accept a GSM authentication challenge, if a USIM is inserted. After a successful GSM authentication, the GSM ciphering key and the ciphering key sequence number, are stored both in the network and the MS.
description: The GSM ciphering key is a parameter used for encryption and decryption in GSM networks.
explanation: Categorized as a Parameter because it represents a specific value used in the network.
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biotag_Description: O,B-Parameter,I-Parameter,I-Parameter,O,O,O,O,O,O,O,O,O,B-Network,O