Lee-Chiu 使用智慧卡之遠端身份認證法的改良

Abstract

Remote authentication schemes play an important role to help server authenticate remote users in the Internet. Lee and Chiu proposed their remote authentication scheme to overcome some security problem in previous remote authentication schemes. Unfortunately, in this paper, some attacks are proposed to show that Lee and Chiu’s scheme is vulnerable under the forgery attack and the denial of service attack. To conquer these security problems, our improved scheme is also proposed. So our scheme is more secure than Lee and Chiu’s scheme. In our scheme, users freely and securely choose and change their passwords.