Ciphertext-Policy Attribute Based Encryption with Selectively-Hidden Access Policy

In conventional Ciphertext-Policy Attribute-Based Encryption (CP-ABE), the access policy appears in plaintext form that might reveal confidential user information and violate privacy. CP-ABE with hidden policies hides all attributes, but computational burden increases due to attribute hiding. this paper, we present a Linear Secret Sharing Scheme (LSSS) structure scheme only sensitive rather than policy. We also provide an selection method choose these attributes use Attribute Bloom Filter (ABF) hide them. Compared existing major schemes policies, our proposed is flexible selecting hide. This enhances efficiency of hiding while still protecting Test results show approach reasonable feasible.