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Application filed by Qualcomm IncfiledCriticalQualcomm Inc
Publication of TW200631376ApublicationCriticalpatent/TW200631376A/en
Methods and devices for instructing a subscriber identity module in a cellular communications network to process non-standard authentication information in a standard manner are disclosed. One embodiment of a method comprises receiving a first message authentication code (MAC) and an authentication management field (AMF) at a subscriber identity module as part of an authentication protocol, calculating a second MAC and determining whether the second MAC is equivalent to the first MAC. If the first and second MAC are not equivalent, the SIM calculates a third MAC and determines whether the first MAC is equivalent to the third MAC, and if so, the subscriber identity module processes the AMF in a predefined or standard manner.
TW094130883A2004-09-082005-09-08Mutual authentication with modified message authenication code
TW200631376A
(en)