A dual‐purpose signature for authentication on UMTS
Chang‐Kuo Yeh, Wei‐Bin Lee · Journal of the Chinese Institute of Engineers · 2007
In UMTS, the mobile station and the authentication server can perform mutual authentication via the secret shared key. This implies that the server requires a secure storage to maintain the shared keys of all users. Clearly this large, sensitive storage increases both maintenance loading and security concerns: re malicious intruders. As this paper shows, the signature technique can be applied not only to discard the bulky storage needed at the server but also to guarantee the access rights of the mobile clients. Two different important purposes can be simultaneously achieved from the same signature equation, so the Dual‐Purpose signature provides valuable improvements to UMTS.