Cryptanalysis and enhancements of delegation-based authentication protocol for secure roaming service

Authors:
Yichen Wang;Qiong Pu;Shuhua Wu
Affiliations:
Department of Computer Science and Software Engineering, Xi'an Jiaotong-Liverpool University, No. 111 Ren'ai Road, Suzhou Dushu Lake Higher Education Town, Suzhou Industrial Park, Jiangsu Province ...;CIMS Research Centre, Tongji University, No. 4800 Caoan Road, Jiading District, Shanghai, 201804, China.;Department of Networks Engineering, Information Engineering University, Zhengzhou Mailbox 1001, No. 770, He'nan Province, 450002, China/ State Key Laboratory of Information Security, Graduate Univ ...
Venue:
International Journal of Electronic Security and Digital Forensics
Year:
2012

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Abstract

Most recently, Youn and Lim proposed an improved delegation-based authentication protocol for secure roaming service with unlinkability. In this letter, we show that: 1) it is vulnerable to a denial of service (DoS) attack; 2) cannot provide the unlinkability as claimed. Finally, we propose an enhanced protocol to remedy the security loopholes existing in it. Moreover, our improved protocol is still efficient.