Formal Verification and Analysis of 5G AKA Protocol Using Mixed Strand Space Model

The 5th generation mobile communication technology (5G) authentication and key management (AKA) protocol specified by the 3rd partnership project (3GPP) includes three cases because it introduces synchronization failure message code (MAC) procedures. Thus, there may be interactions between these cases, forming vulnerabilities that do not exist in any single case. However, this is fully considered existing formal analysis improvement of 5G AKA protocol. To solve problem, paper formally analyzes security latest version based on mixed strand space model for protocols finds many new attacks, including cross attacks cases. Then, a secure efficient primary agreement networks proposed, which named 5G-AKA’. In 5G-AKA’ protocol, pre-shared user equipment (UE) home network (HN) replaced with derivation key, challenge–response mechanism serving (SN) HN added, subscription permanent identifier (SUPI) UE added to second SN HN, MAC timeout HN. Finally, proved can overcome Additionally, comparative shows better than recently improved security, backward compatible