MULTI-OWNER DATA SHARING

In the case of Provable Multiple files Data that changes over time in cloud computing, possession refers to the dynamic transfer of stored data to a cloud server. Multiple files indicate that the data will be replicated on multiple servers. The project owner uploads the data to the cloud server using automatic data capture, and the files are then stored on multiple servers. Data loss due to hacking and server crashes can be avoided by uploading data to multiple servers. By distributing the secret key among the several users, multi-user searchable encryption directly adapts a single-user system to a multi-user environment. This is obviously not capable of achieving user accountability, and in the event of user revocation, it necessitates key renewal among non-revoked users, which then necessitates re-encrypting the external database. These issues might be resolved if the cloud implemented access control before responding to user search requests, but as noted in, access control deployment is prohibitively expensive in practise. To make matters worse, users must maintain a separate set of secrets for authentication and authorization. We introduced a new technique, fully homomorphic encryption (FHE), in this project for multiple data file acquisition, file security, and data corruption. For data protection, we must use the FHE algorithm in this project. There are three of them: keygen, copygen, and taggen. The process described above was carried out in the existing system.