Specification of an example algorithm for f5** function for MILENAGE and Tuak; Algorithm specification and test data
The present document presents an optional security enhancement for the MILENAGE [5, 6, 12, 13] and Tuak example algorithm set [7, 14, 15] for the 3GPP authentication and key agreement functions. The enhancement addresses a subscriber traceability issue discovered by academic researchers [9] and is provided as an alternative anonymity key generation function f5** that, when enabled, replaces the f5* function of the aforementioned example algorithm sets. A functionally equivalent security enhancement is already included in the new MILENAGE-256 example algorithm set [8].