An Efficient Key Policy Attribute Based Encryption Scheme In Cloud Computing
Keywords:Cloud computing ,Data sharing ,File hierarchy, Key Policy ; Attribute Based Encryption (key words).
We develop a new cryptosystem for fine-grained sharing of encrypted data that we call Key-Policy Attribute-Based Encryption (KP-ABE).As more sensitive data is shared and stored by third-party sites on the Internet, there will be a need to encrypt data stored at these sites. One drawback of encrypting data, is that it can be selectively shared only at a coarse-grained level (i.e., giving another party your private key). Instead of trusting a middle layer authority , we perform an end to end encryption using the Key-Policy Attribute-Based Encryption (KP-ABE).Moreover the proposed system is proved to be secured under standard assumption. With the number of the files increasing, the advantages of our scheme become more and more usefull.
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