Secure Data Sharing in Cloud Computing Using Revocable-Storage Identity-Based Encryption - 2016
Cloud computing provides a versatile and convenient manner for knowledge sharing, that brings various advantages for each the society and individuals. But there exists a natural resistance for users to directly outsource the shared information to the cloud server since the data typically contain valuable data. Thus, it's necessary to place cryptographically enhanced access control on the shared information. Identity-based encryption may be a promising cryptographical primitive to build a practical information sharing system. However, access control isn't static. That is, when some user’s authorization is expired, there should be a mechanism which will take away him/her from the system. Consequently, the revoked user cannot access both the previously and subsequently shared information. To this end, we have a tendency to propose a notion known as revocable-storage identity-based mostly encryption (RS-IBE), that can offer the forward/backward security of ciphertext by introducing the functionalities of user revocation and ciphertext update simultaneously. Furthermore, we gift a concrete construction of RS-IBE, and prove its security within the defined security model. The performance comparisons indicate that the proposed RS-IBE scheme has blessings in terms of functionality and efficiency, and therefore is feasible for a practical and cost-effective information-sharing system. Finally, we have a tendency to offer implementation results of the proposed scheme to demonstrate its practicability.
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