A privacy and delegation-enhanced user authentication protocol for Portable Communication Systems

Authors:
Ren-Chiun Wang;Wen-Shenq Juang;Chin-Laung Lei
Affiliations:
Department of Electrical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei 106, Taiwan.;Department of Information Management, National Kaohsiung First University of Science and Technology, No. 2, Jhuoyue Rd., Nanzih District, Kaohsiung 811, Taiwan.;Department of Electrical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei 106, Taiwan
Venue:
International Journal of Ad Hoc and Ubiquitous Computing
Year:
2010

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Abstract

Recently, Lee et al. proposed a security enhanced delegation-based authentication protocol for Portable Communication Systems (PCSs). The major merits include: 1) the privacy protection of Mobile User (MS); 2) MS can construct a digital signature to prove the requests; 3) the satisfaction of some security properties; 4) the mutual authentication between MS and the Visited Location Register (VLR); 5) low computation and communication cost of MS. We then show that the privacy of MS is not kept and the overcharge problem exists in Lee et al.'s protocol and propose a method to enhance the delegation and security level and to keep the same efficiency.