Attribute Based Privacy Protection Encryption Scheme Based on Inner Product Predicate

Privacy protection is a hot topic in information security, where the privacy issues in Attribute Based Encryption(ABE) can be divided into data content privacy, policy privacy and attribute privacy. Considering the three privacy protection needs of data content, policy and attributes, an attribute-based Privacy-Preserving Encryption Scheme based on inner product predicates (PPES) is proposed. The privacy of data content is ensured by using confidentiality of encryption algorithm, furthermore the blind method of policy attributes and user attributes is constructed through vector commitment protocol to achieve policy privacy and attribute privacy. Based on the hybrid argument technology, adaptive chosen plaintext security of the scheme is proved under standard model. Besides commitment unforgeability of the scheme is also illustrated. The performance analysis results show that the proposed scheme has better operation efficiency compared to existing methods.