Cloud computing ensures a convenient way of trading and sharing of content, where user can access the content easily and the distributor (content provider) outsources the content within the secure channel. Always the confidentiality of content is the main problem faced by the distributor and due to this reason they are afraid to outsource the content through cloud computing. As a solution they use the Digital Right Management (DRM) scheme which uses the concept of keyserver, License server and Content Encryption Key for data protection and also it uses Additive Homomorphic Probabilistic Public Key Encryption and Proxy Re-encryption rules for encrypting and decrypting the keys and contents. Homomorphic is simply adding of two keys, which is easy to the intruder to hack it and use the content. Instead of this simple Homomorphic Encrytpion we try to use Fully Homomorphic Encryption to give more security for data and also we try to reduce the number of transactions in the base system.
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M. K. Babu, Udayan, D., and Sumesh, S., “Secure data communication in cloud using fully homomorphic encryption”, International Journal of Control Theory and Applications, vol. 9, pp. 7627-7632, 2016.