Secure Data Sharing In Cloud Computing Using Revocable-storage Identity-base

Abstract– The ability to share data in a manner that is both flexible and convenient thanks to cloud computing brings a variety of benefits to individuals as well as to society as a whole. These benefits can be broken down into two categories: individual benefits and societal benefits. Because the data frequently contain valuable information, users have a natural reluctance to directly outsource the shared data to the cloud server. This is because the data contain valuable information. As a consequence of this, it is absolutely necessary to implement an access control system that is bolstered by cryptography and is applied to the data that is shared. Identity-based encryption is an intriguing example of a cryptographic primitive that shows promise for use in the construction of a data-sharing system that is both secure and usable. However, the access control system is not a permanent fixture. In other words, there should be a mechanism that can remove a user from the system when that user’s authorization has run out and the authorization has expired. This would be the same as saying that the authorization has expired. The revoked user is prevented from accessing any data that was either previously or subsequently shared as a direct result of this action. We propose the use of a concept that we refer to as revocable-storage identity-based encryption, or RS-IBE for short, in the hopes of accomplishing this objective. By simultaneously introducing the functionalities of user revocation and ciphertext update, RS-IBE is able to provide both forward and backward security for ciphertext. In addition to this, we present a concrete construction of RS-IBE and demonstrate that it is secure within the framework of the security model that we defined. The performance comparisons demonstrate that the suggested RS-IBE scheme possesses advantages in terms of functionality and efficiency. As a consequence, it is plausible that a system that is both practically applicable and cost-effective for sharing data could be developed using this scheme. In the end, we will show that the proposed plan can work by showing the results of putting it into action and finding that it worked.