Cloud computing is the next generation in the field of on-demand information technology. This is a combination of the already existing and the newly emerging techniques from virtualization and service oriented architecture like research areas. Cloud storage removes the burden of locally storing and maintaining of data or application in spite of so many advantages of cloud computing, in case of sensitive data on cloud servers, access control is a major challenge. For this problem to be overcome,

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... here we give a detailed study of certain previous and recent methods. This study ranges from encryption of data before storing to the recent method key attributes-based encryption with time specified attributes (KABE-TSA). The KABE-TSA is a self-deleting scheme in cloud computing. The KABE-TSA is in a place to resolve some necessary security problems by supporting user outlined authorization quantity and by providing fine-grained access management all through the quantity, the sensitive info are aiming to be firmly self-destructed once a user-specified expiration time, the KABE-TSA theme is tried to be secure beneath the choice l-bilinear Diffie-Hellman inversion (l-Expanded BDHI) presumption, comprehensive distinction of the protection properties indicate that the KABE-TSA theme planned by USA satisfies the protection wants and is superior to alternative existing schemes.