A New Pairing-Free Certificateless Signature Scheme for Internet of Things.

The Internet of Things (IoT) has been more and more popular in people’s lives because it can bring convenience to our lives. Communication between IoT smart devices is vulnerable to various attacks. Therefore, designing a lightweight and secure cryptographic protocol for IoT applications is an important task. In this paper, we find that Jia et al.’s certificateless signature scheme cannot resist public key replacement attacks. Then, we propose a new certificateless signature scheme (PK-CLS) to resist super type I and type II adversaries. Finally, we prove the security of our PK-CLS scheme in the random oracle model.