Achieve High Verifiability using Proxy Resignature and TPA in User Revocation within the Cloud

Abstract

Using Cloud Storage, users can remotely store their data and enjoy the on-demand high quality applications and services from cloud. User can get relaxation from the burden of local data storage and maintenance. In addition, we have an efficient probabilistic query and audit services to improve the performance of approach based on periodic confirmation. So that the users existing blocks by themselves do not need to sign up and download the proxy by using the idea of re-signatures, we block the user revocation on behalf of existing users to the cloud, the signing in again to allow for..In addition, a public Verifier always without retrieving all of the data shared data is able to audit the integrity of Cloud, even if part of the shared data has been signed by the cloud again. Moreover, our system by multiple auditing functions with batch verification audit is able to support. Experimental results show that our system fairly can improve the efficiency of user cancellation. Data storage and sharing services in the cloud, users can easily modify and share data in a group. Shared data to ensure unity in public, group users shared data to calculate signatures on all blocks need to be verified. Shared data by different users in different blocks are usually due to data revisions have been signed by individual users. The proposed system considers proxy resign, if the user from group get revoked. Cloud is able to resign block, which was created previously by the revoked user with existing users private kye. As a result, user revocation can be greatly improved, and capacity of computing and communications resources of existing users can be saved.
DOI: 10.17762/ijritcc2321-8169.150625