Preserving forward anonymity on dynamic ID based remote user authentication scheme

Abstract

Recently, the use of smart cards in human life is increasing. One important aspect in implementing smart cards in human life is its security. Security should be considered because smart cards can contain important data that must be protected, and specific research is needed to address attacks against smart card. There are weaknesses in preserving forward anonymity on dynamic ID-based remote user authentication using smart cards as mentioned in Zhai et al. In their work, attacks that led to the failure of forward anonymity have been successfully carried out. This problem has already been overcome by Lee’s scheme, with the probability of the forward anonymity failure was ½296 but the computation cost was still high. This research discussed about overcoming attacks that can lead to the failure of forward anonymity with probability of less than ½296 and has less computation cost. For this purpose, discrete log function and multiplicative inverse is introduced instead of using hash function and Diffie-Hellman method. Based on the discussion it is proven that these functions can preserve the forward anonymity with the probability of failure less than ½296.