An Improved Delegation-Based Authentication Protocol for PCSs

作者：Lee Cheng Chi; Chang Rui Xiang; Chen Te Yu; Chen Lung Albert^*

来源：Information Technology and Control, 2012, 41(3): 258-267.

DOI：10.5755/j01.itc.41.3.857

• authentication
• delegation-based authentication
• portable communication systems
• user anonymity
• perfect forward secrecy
• roaming
• public-key

Portable Communication Systems (PCS) can provide mobile users with an opportunity to enjoy global roaming services. A lot of researchers have previously proposed their secure protocols for protecting the mobile privacy of the users in PCS. Most protocols pointed out that Lee-Yeh%26apos;s protocol and Lee et al.%26apos;s protocol are vulnerable to some attacks. Then they proposed their improved protocols to remedy these shortcomings. Unfortunately, we found out that the Lee et al.%26apos;s protocol still cannot achieve user anonymity and does not provide perfect forward secrecy. In this paper, we also propose an improved protocol to solve these security problems. Compared with other protocols, our proposed protocol not only achieves all security requirements and functionality requirements but also is more efficient.

• 出版日期2012