Dual Revocation: Attribute and User Revocation Based On CPABE In Cloud Computing
Mariem Bouchaala, Cherif Ghazel, Leı̈la Azouz Saı̈dane · 2019
Access Control models are required to secure Cloud Computing from unauthorized access. As an efficient cryptographic tool, Ciphertext Policy Attribute Based Encryption offers a fine-grained access to user assets. But, revocation operation presents a major brake in the implementation of this algorithm. However, existing approaches either cannot deal with this problem or have an important computation and/ or storage overheads. In this paper, we propose a sliced revocable solution resolving the aforementioned issues abbreviated MRS-CPABE. It is an efficient solution in case of lazy or complete revocation. We apply information dispersal algorithm and we introduce a match then decrypt process. To assess the perfromance of our solution, we perform a security evaluation with Scyther tool and a formal validation to prove that our proposal can withstand various known attacks. Then, we expose the experiments simulation results.