Cryptanalysis of a Handover Authentication Scheme Using Credentials Based on Chameleon Hashing

Eun-Jun YOON
Muhammad Khurram KHAN
Kee-Young YOO

IEICE TRANSACTIONS on Information and Systems   Vol.E93-D    No.12    pp.3400-3402
Publication Date: 2010/12/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.E93.D.3400
Print ISSN: 0916-8532
Type of Manuscript: LETTER
Category: Information Network
handover authentication,  chameleon hashing,  security,  forward/backward secrecy,  

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Quite recently [IEEE Commu. Letters, Vol.14, No.1, 2010], Choi et al. proposed a handover authentication scheme using credentials based on chameleon hashing, claiming to provide several security features including Perfect Forward/Backward Secrecy (PFS/PBS). This paper examines the security of the scheme and shows that the scheme still fails to achieve PFS/PBS unlike their claims.