Attribute Based Encryption with Fine-grained Access Provision in Cloud Computing

Abstract

In Ciphertext Policy Attribute based Encryption (CP-ABE) technique, the data owner encrypts the data without any knowledge of data users, but they only specify the data access policy regarding user attributes. The data owner is unaware about the actual data users, which decreases the level of fine-grained access measure. In the proposed system, whenever the data owner shares information it predetermines the relationship between both the user attributes and data access policies as well as the users and data access policies, which is defined in terms of attribute and user access concepts. Through which the actual information on data users is easily obtained. The process of user access provision is made, when the attribute access concept matches with the user access concept. In this manner, the proposed system solves better solves the problem of fine-grained access provision and the experiments shows comparatively improved results than existing techniques.