• M.Yamuna
• M.Radhika
• S.Keerthiga
• M.Ramasamy

One of the most promising application platforms is cloud computing it is used to solve the explosive expanding of data sharing. In cloud computing, to protect data from leaking, users need to encrypt their data before being shared. Access control is paramount as it is the first line of defense that prevents unauthorized access to the shared data. In this method user can share a sensitive information, such as the business financial records, research data, or personally identifiable health information etc. The encrypted outsourcing data as to provide end to- end data confidentiality assurance in the cloud . One of the hardly noticed problem for client is key exposure, but it is inherently existed in previous research. Furthermore, enormous client decryption overhead limits the practical use of ABE. The proposed collaborative Mechanism effectively solves both key escrow problem but also key exposure. Meanwhile, it helps markedly reduce client decryption overhead. However making the computation over the encrypted data is very hard problem. The proposed scheme not only achieves scalability but it is more secure than previous scheme .The proposed scheme having a mutual key supervision procedure for cloud data distribution and file safety based on hierarchical method.

Key management ,CP-ABE, security, efficiency, cloud data sharing

"Cloud Data Distribution And File Safety Based On Hierarchical Method", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 3, page no.639-642, March-2018, Available :http://www.jetir.org/papers/JETIR1803114.pdf

"Cloud Data Distribution And File Safety Based On Hierarchical Method", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 3, page no. pp639-642, March-2018, Available at : http://www.jetir.org/papers/JETIR1803114.pdf