Validating Integrity for Shared Data with Efficient User Revocation in the Cloud
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International Journal of Engineering Trends and Technology (IJETT) |  |
| © 2016 by IJETT Journal | ||
| Volume-35 Number-3 |
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| Year of Publication : 2016 | ||
| Authors : Divya Vikas, Jai Prakash Singh, Trigun Singh, Dhatri P |
Citation
Divya Vikas, Jai Prakash Singh, Trigun Singh, Dhatri P"Validating Integrity for Shared Data with Efficient User Revocation in the Cloud", International Journal of Engineering Trends and Technology (IJETT), V35(3),108-110 May 2016. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group
Abstract
With data storage and sharing services in the cloud, users can easily modify and share data as a group. To ensure shared data integrity can be verified publicly, users in the group need to compute signatures on all the blocks in shared data. Different blocks in shared data are generally signed by different users due to data modifications performed by different users. For security reasons, once a user is revoked from the group, the blocks which were previously signed by this revoked user must be resigned by an existing user. In this paper, we propose a novel public auditing mechanism for the integrity of shared data with efficient user revocation in cloud. By utilizing the idea of proxy re-signatures, we allow the cloud to resign blocks on behalf of existing users during user revocation, so that existing users do not need to download and re-sign blocks by themselves. In addition, a public verifier is always able to audit the integrity of shared data without retrieving the entire data from the cloud, even if some part of shared data has been re-signed by the cloud. Moreover, our mechanism is able to support batch auditing by verifying multiple auditing tasks simultaneously. Experimental results show that our mechanism can significantly improve the efficiency of user revocation.
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Keywords
Integrity, shared data, user revocation, cloud computing