A secure user authentication method in networked intelligent manufacturing systems

In this paper, we propose a secure user authentication method for a networked manufacturing system, which is a system framework of computer-aided solutions to support the manufacturing industry, in particular the automobile and shipbuilding sector. The proposed authentication method called as CRI-TMT is based on a challenge-response identification scheme using a time-variant mapping table. The proposed CRI-TMT can prevent a user´s secret from key-log or over-the-shoulder attack. Also a user´s secret data is not stored on the verifier´s side. Thus, a user´s secret data is not disclosed even though attackers break into the authentication server. Through an analytical study, we show that the gain of the attackers who have users secret-related data by observing the verification step is not bigger than that of the blind attackers without any user´s secret data. We also show the feasibility and practicality of the CRI-TMT system by a fast implementation