Identity-Based and Leakage-Resilient Broadcast Encryption Scheme for Cloud Storage Service

Cloud storage services are an important application of cloud computing. An increasing number data owners store their on platforms. Since platforms far away from users, security and privacy protection very issues that need to be addressed. Identity-based broadcast encryption (IBBE) is method provide for services. Because the side channel attacks may lead disclosure key information cryptographic system, which will damage this paper provides identity-based with leakage resilience by state partition (LR-SP-IBBE). By using a binary extractor compensate loss in entropy symmetric caused side-channel attacks, proposed scheme randomizes encapsulated key. Furthermore, technique, we split private into two parts, corresponding decryption was divided stages. Through double-system skill, leakage-resilience were proved composite order group model.