Abstract

Cloud storage is widely adopted nowadays. Considering about the data leakage issue, people encrypted the data before uploading them to cloud server. However, due to the loss of data’s original properties, it is hard to search the encrypted data directly. To solve this problem, searchable encryption scheme has been proposed to search the data stored on Cloud server in the ciphertext domain. To enhance the searchable encryption scheme’s practicability, we propose a scheme, which has constant- size keys, to decrease the corresponding storage requirement. In this work, we also provide efficient mechanisms for the participation and revocation of a user. Therefore, it can be easily applied to storage systems of a University or a cooperate user. More importantly, it is our belief that our work provides a useful function for dealing with the mandating enforcement of General Data Protection Regulation (GDPR). Finally, a prototype based on the proposed scheme has been built to verify the feasibility of our work.