Comments on “V2G-Auth: Lightweight Authentication and Key Agreement Protocol for V2G Environment Leveraging Physically Unclonable Functions”

Recently, Reddy et al. (IEEE Transactions on Industrial Cyber-Physical Systems, 2023, DOI: 10.1109/TICPS.2023. 3290539) proposed a lightweight authentication and key agreement protocol for V2G environments that uses hash functions and multiple physical unclonable functions. However, we find that Reddy et al.’s protocol cannot resist known session-specific temporary information (KSSTI) attacks. To address these limitations, we discuss an improvement that addresses the above issues.