|Title: " SECURE AND REVOCABLE DATA ACCESS CONTROL FOR MULTI-AUTHORITY CLOUD STORAGE "|
Abstract— Data access control is an effective way to ensure the data security in the cloud. Due to un trusted cloud servers and data outsourcing, the data access control becomes a challenging issue in cloud storage system. Cipher text-Policy Attribute based Encryption is regarded as one of the most suitable technologies for data access control in cloud storage, because it gives data owners to more direct control on access policies. However, it is difficult to directly apply the existing CP-ABE schemes to data access control in cloud storage system, because of the attribute revocation problem. In this paper, we design secure and revocable data access control for multi-authority cloud storage system and also it will efficient and effective cloud storage system. Were there are multiple authorities co-exist and each authority is able to issue attribute independently. Specifically, we propose most suitable encryption is called hybrid encryption method and it has two types of different encryption algorithm one is the most suitable of AES algorithm and another one is the jasypt algorithm, It will give more security in the cloud storage system and a revocable multi- authority CP-ABE scheme, and applying it as the underlying technique to design the data access control scheme. Our attribute revocation method and hybrid encryption method can efficiently achieve both forward and backward security and secure storage system. The analysis and simulation results show that our proposed data access control scheme is secure in the random oracle model and it is more secure and efficient than previous work. .