Hierarchical Identity-Based Online/Offline Encryption Scheme with Leakage Resilience

Abstract

The adversary is able to obtain some secret information from side channel attacks, which further damages the security for the system. To resolve this issue, we provide a hierarchical identity-based online/offline encryption scheme which resists side channel attacks. In our scheme, most encryption operations are preprocessed in the offline stage and only a small amount of lightweight calculation needs to be performed in the online stage for generating ciphertext. The presented scheme greatly reduces the workload of online encryption and is suitable for the resource-constrained device. The security of the proposed scheme is proved by the dual system technique. The leakage performance analysis shows that the presented scheme is resilient to leakage for almost the whole symmetric key.