Abstract: With the development and benefits of cloud computing more and more users outsources their data to third party cloud storage for ease of sharing and cost saving. Security of the outsourced data has become the core problem of cloud computing. Many security models have been proposed, in which Cipher Text-Policy Attribute Based Encryption is considered as an efficient tool for fine grained data access in the cloud storage system. The practical applications of CP-ABE in cloud has own inherent challenges regarding user revocation, cipher text size, and number of user attributes, access structures and many more. There are many works proposed to address these problems from various researches. This paper gives the overview of various research works based on CP-ABE. The performance analysis of these works is carried out.

Keywords: Collaborative Key Management, Distributed Key Management System, Access Control, Conjunctive Keyword Search, Dispensability Matrix

| DOI: 10.17148/IARJSET.2020.7109