Now days, plenty of users are storing their data’s in cloud, as a result of it provides storage flexibility. However the most downside in cloud is information security. Information access management is efficient thanks to make sure the information security within the cloud. Because of information outsourcing and untrusted cloud servers, the information access management becomes a difficult issue in cloud storage systems. Cipher text-Policy Attribute based mostly encoding (CP-ABE) is thought to be one in every of the foremost appropriate technologies for information access management in cloud storage, as a result of it provides information homeowners additional direct management on access policies. However, it's tough to directly apply existing CP-ABE schemes to information access management for cloud storage systems as a result of the attribute revocation downside. during this paper, we have a tendency to style associate degree communicative , economical and voidable information access management theme for multi-authority cloud storage systems, wherever there are multiple authorities co-exist and every authority is in a position to issue attributes severally. Specifically, we have a tendency to propose a voidable multi-authority CP-ABE theme, and apply it because the underlying techniques to style the information access management theme. Our attribute revocation methodology will with efficiency bring home the bacon each forward security and backward security. The analysis and simulation results show that our projected information access management theme is secure within the random oracle model and is additional economical than previous works.

Ch.Anusha,A.Harshavardhan."Deniable Access Control for Multi-Authority Cloud Storage". International Journal of Computer Engineering In Research Trends (IJCERT) ,ISSN:2349-7084 ,Vol.2, Issue 10,pp.861-866, October- 2015, URL :https://ijcert.org/ems/ijcert_papers/V2I1013.pdf,

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