A Novel Key-Policy Attribute-Based Encryption Schema with Verifiable Computation in Cloud

Abstract

Most of the organizations and data owners starts to outsource their important data to the public cloud for reduced management cost and ease of access. Encryption helps to protect user data confidentiality, it makes difficult to perform secure plain text search over the encrypted data Attribute-Based Encryption (ABE) is a promising cryptographic primitive which significantly enhances the versatility of access control mechanisms. There are two complementary forms of attribute based encryption. One is key-policy attribute-based encryption (KP-ABE) and the other is cipher text-policy attribute-based encryption (CPABE). In a KP-ABE system, the decision of access policy is made by the key distributor instead of the encipherer, which limits the practicability and usability for the system in practical applications. On the contrary, in a CP-ABE system, each cipher text is associated with an access structure, and each private key is labelled with a set of descriptive attributes.

Index Term: Cloud Computing; ABE; CP-ABE; KP-ABE; CIA; IBE; Cloud storage.