Improvement on a Provable Secure Access Control using Smart Cards

Abstract

An access control scheme integrating with user authentication is proposed. Though the scheme is provably secure in request messaging (authentication), there is a flaw in access control. This paper presents an attack on the access control system; and further, an improvement is proposed to remedy this flaw. Our improvement only increases the information size and the cost of computations during registration time, but these quantities are not increased during the login and verification phase.