Vahid Yousefipoo - Electrical Engineering Dept, Sharif University of Technology, Tehran, Iran
Mohammad Hassan Amer - Electronics Research Institute, Sharif University of Technology, Tehran, Iran
Javad Mohajer - Electronics Research Institute, Sharif University of Technology, Tehran, Iran
Taraneh Eghlidos - Electronics Research Institute, Sharif University of Technology, Tehran, Iran

Search ability on encrypted data without any information leakage is a matter of concern in cloud computing.Also, establishing such a policy to control data access is another concern. Searchable encryption (SE) along withattribute-based encryption (ABE) have resolved both problems. Attribute-based keyword search (ABKS) scheme usesboth features simultaneously. In most ABKS schemes, data user has no freedom of action in his search and he can justquery the cloud to search for certain keywords. While he may not need to receive some data. We have focused on thisissue and proposed a scheme which can seive the search results. In the proposed scheme, both data user and dataowner establish their policies to determine which keywords or files are to be searched or accessed. Besides, the dataowner attaches his files using labels to specify the contents of the files to prevent any conceptual ambiguity in thedesired keywords. In spite of using two ABKS schemes the computational complexity of the proposed scheme is notdoubled.

keyword search, label, cloud computing, attribute based encryption