Design of an Efficient User Authentication Mechanism using Enhanced Version of Otway-Rees Protocol

An enhancement of the authentication protocol for Otway- Rees protocol is proposed to improve some drawbacks of original Otway-Rees protocol and Improved Otway-Rees protocol. In context, a problem is in original Otway-Rees protocol suffer from lack of data integrity and data confidentiality invites impersonation attack by modifying message format sequence and adding other messages. The Improved Otway-Rees protocol removes redundancy in Otway-Rees protocol messages and also avoids impersonation attack. This protocol does not supporting bilateral authentication. This paper proposes a novel enhanced work on authentication protocol, which eliminates redundancy in original Otway- Rees protocol and removes the limitations like impersonation attack by modifying and adding some cipher chunks messages and also eliminates flaws in Improved Otway-Rees protocol by providing bi- lateral authentication mechanism. As a result, the protocol satisfies the strong goals of identifying authentication and also meet mutual authentication with assuring data integrity, data confidentiality and secure key distribution between involving parties.