An Improvement of the User Identification and Key Agreement Protocol with User Anonymity

Article type: Research Article

Authors: Yoon, Eun-Jun | Yoo, Kee-Young

Affiliations: School of Computer Engineering, Kyungil University, 33 Buho-Ri, Hayang-Ub, Kyungsan-Si, Kyungsangpuk-Do 712-701, Republic of Korea, e-mail: ejyoon@kiu.ac.kr | School of Computer Science and Engineering, College of IT Engineering Kyungpook National University, 1370 Sankyuk-dong, Buk-gu, Daegu 702-701, Republic of Korea, e-mail: yook@knu.ac.kr

Abstract: User anonymity is very important security technique in distributed computing environments that an illegal entity cannot determine any information concerning the user's identity. In 2006, Kumar–Rajendra proposed a Secure Identification and Key agreement protocol with user Anonymity (SIKA). This paper demonstrates the vulnerability of the SIKA protocol and then presents an improvement to repair the security flaws of the SIKA protocol.

Keywords: cryptography, identification, key agreement, anonymity, security, unlinkability

Journal: Informatica, vol. 23, no. 1, pp. 155-172, 2012