Group signature with time-bound keys and unforgeability of expiry time for smart cities

Abstract Internet of Things (IoT) lays the foundation for various applications in smart cities, yet resource-constrained IoT devices are prone to suffer from devastating cyberattacks and privacy leak threats, thus inevitability supposed as weakest link systems cities. Mitigating security risks data computing limitation edge devices, especially identity authentication key validity management group essential system security. In order tackle issues anonymity, traceability, unforgeability expiry time well efficient membership revocation life-cycle setting, we presented a dynamic time-bound signature with time. Unforgeability disables revoked signer create valid by means associating signing an The anonymity traceability proposed scheme contribute entities supervision authority agency. Moreover, our proposal is feasible setting computational cost verification algorithms.