A provably secure certificateless online/offline signature scheme for internet of things

A provably secure certificateless online/offline signature scheme for internet of things

연구 분야: Cryptography

학회: The Journal of Supercomputing

With the rapid development of Internet of Things (IoT), it is necessary to guarantee the integrity, authentication and nonrepudiation of messages. Considering the high security and efficiency requirements of the data transmission for the IoT, the online/offline signature scheme is a wonderful choice. However, most of the existing online/offline signature schemes are based on "hash-sign-switch" paradigm, and they exist key exposure as well as high storage overhead problems. Therefore, this paper designs a provably secure certificateless online/offline signature scheme for IoT (psCL-OOS). By incorporating the double-trapdoor chameleon hash to the scheme, the key exposure-free is perfectly achieved. Moreover, based on the discrete logarithm problem, we prove the security of the scheme in the random oracle model. The results show that our scheme can resist both type I and type II adversary attacks, and is strongly unforgeable against adaptively chosen message attacks. Finally, performance analysis shows that the psCL-OOS scheme is superior to other compared schemes on computational complexity and communication overhead.