A Multi-users Searchable Encryption Scheme with Proxy Re-encryption

We propose a new multi-users searchable encryption scheme based on proxy re-encryption, our scheme is an improvement of multi-users searchable encryption scheme proposed by Yang et al. In our scheme, the secret key is re-encrypted and access control strategy is used for re-encrypt key to achieve distinguishable search and perfect revocation for authorization. The data index structure is designed based on consideration of actual physics structure of cloud storage system to attain higher efficiency and practicability. Especially, lower computational expense for client is achieved in the new scheme.