Amelioration of Decentralized Cipher Text Policy Attribute Based Encryption with Mediator technique by adding Salt

The existing techniques had focused more on the attribute based encryption, cipher text policies and multiple authorities to make the network security more sheltered. But due to the attribute leak problem, these techniques were disabled to protect user’s privacy. To enhance the security level, the proposed system has added salting method into the DCP-ABE-M scheme. Here both the data and user attributes are utilized to avoid attribute leak problem. The proposed system has a decentralized environment which contains multiple authorities who generates secret keys by using user attributes, data attributes and also contains multiple mediators who act as the middleware between user-authority. Both the power’s doesn’t stores any user details or full secret keys in their DB or in system. That is, all the user details and secret key will be hidden. In some cases the different users may use same keywords as their passwords which may leads to rainbow table attack or dictionary attack. To avoid this problem, salting is added into DCP-ABE-M. A unique salt value is added into the passwords which makes the password more strong and different from other passwords. Hence the proposed system enhances the level of security by adding salt value and is more efficient than the previously existing schemes.