Cryptanalysis and improvement of two access control schemes with user authentication in a distributed computer network
In 1998. Jan and Tseng proposed two integrated schemes of user authentication and access control which can be used to implement a protection system in distributed computer systems. This paper will analyze the security of both schemes and show that an intruder can easily forge a login, be accepted and logged in as a legal user, and access system resources. We will then propose a modified scheme to withstand our proposed attacks.
cryptanalysis access control user authentication cryptography