A Key Supervision Procedure for Cloud Data and File Safety

摘要

Cloud Computing has been the most encouraging fields for solving the process of data sharing. In Cloud computing, to protect data from leakage, users need to encrypt their data before being shared. It is necessary to protect the shared data from unauthorized access. To combat against unauthorized information leakage, sensitive data have to be encrypted before outsourcing so as to provide end to-end data confidentiality assurance in the cloud and beyond the proposed collaborative Mechanism effectively solves not only key escrow problem but also Key Generation. At the end, it will result in the reduction of client decryption overhead. However, ordinary data encryption techniques in essence prevent cloud from performing any meaningful operation of the underlying cipher text-policy, making computation over encrypted data a very hard problem. This control of access can be done using hierarchy method, which consists of several levels of authority linked to it.