An Efficient Multi-keyword Searchable Encryption Supporting Multi-user Access Control

Due to the strong storage capacity and calculating power of cloud computing, more and more users outsource their data to the cloud. To avoid users’ data exposed to cloud, searchable encryption which can search over the encrypted data is studied. In this paper, based on the multi-keyword searchable encryption proposed by Cash et al., through enforcing access control for users, we present an efficient multi-keyword searchable encryption supporting multi-user access control(MMSE). MMSE supports multi-user scenarios, and only the users whose attributes satisfy the policy can generate the search token, no matter the data owner is online or not. The security and performance analysis shows that the proposed MMSE is secure and efficient.