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

摘要

Quite recently IEEE Commu. Letters, Vol.14, No.l, 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.