Password Authentication Using Smart Card over Unsecure Channel

Password authentication is one of easiest and most appropriate authentication methods under unprotected channels. The problem of password authentication over unprotected channel is existed in various uses. Computing resources have increased considerably, password authentication is more often needed essential to login to computers, and wireless networks. Many authentication systems that rely on encryption schemes are proposed to solve some difficulties in the past. But, existing systems are vulnerable to different attacks and are neither efficient, nor user friendly. The user cannot select and alter its passwords regularly. In this research, we introduce a new password authentication system to meet all suggested requirements. The proposed system uses a Diffie-Hellman key agreement protocol under unprotected channels to encrypt and decrypt the communicated messages using asymmetric cryptography. KeywordsDiffie-Hellman exchange key; wireless security; one-time password; password authentication system;