A survey on attacks in remote user authentication scheme

Remote user authentication scheme is designed to provide facility of system access at different places without any disturbance. Communication should be secured and verified in remote user authentication. There are various schemes available in which smart card, password, and biometric features are used for authentication. Thus, many researchers introduced different attacks in authentication scheme. We made state of art survey on three different schemes which are Chang-Cheng´s scheme, Li-Weng-Fan´s scheme and Adela´s scheme in this paper. In addition, we summarized three different schemes based on their performance.