Attribute Based Hybrid Encryption with User Revocation in Data Outsourcing Systems
Cloud computing is an emerging computing paradigm, enabling users to remotely store their data in a server and provide services on demand. In cloud computing cloud users and cloud services providers are almost certain to be from different trusted domain. The confidentiality of the data is major problem when users use commercial cloud servers to store their records because it can be view by everyone, by assuring that the users control the access to their own records, it is a promising method to encrypt the files before outsourcing and access control should be enforced though cryptography instead of role based access control. Cipher text policy attribute based hybrid encryption is a promising cryptographic solution to these issues for enforcing access control policies defined by data owner on outsourced cloud data. The access control mechanism using cipher text policy attribute based hybrid encryption to enforce access control policies with efficient user attribute and user revocation capability. The fine grained access control can be achieved by dual encryption mechanism which takes advantages of the attribute based hybrid encryption and selective group key distribution in each attribute group. On demonstrating the proposed algorithm the confidential data is efficiently managed and secured in data outsourcing in cloud system.