Description

ABSTRACT

As Cloud Computing becomes prevalent, sensitive information are being increasingly centralized into the cloud. For the protection of data privacy, sensitive data has to be encrypted before outsourcing, which makes effective data utilization a very challenging task.Data encryption protects data security to some extent, but at the cost of compromised efficiency. Searchable symmetric encryption (SSE) allows retrieval of encrypted data over cloud.In the existing system server-side ranking based on order-preserving encryption (OPE) inevitably leaks data privacy.To eliminate the leakage the proposed system contains a two-round searchable encryption (TRSE) scheme that supports top-k multikeyword retrieval.The TRSE scheme eliminates the data leakage and the data security is ensured.