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Comments on a Public Auditing Mechanism for Shared Cloud Data Service | IEEE Journals & Magazine | IEEE Xplore

Comments on a Public Auditing Mechanism for Shared Cloud Data Service


Abstract:

Recently, a public auditing protocol for shared data called Panda (IEEE Transactions on Services Computing, doi: 10.1109/TSC.2013.2295611) was proposed to ensure the corr...Show More

Abstract:

Recently, a public auditing protocol for shared data called Panda (IEEE Transactions on Services Computing, doi: 10.1109/TSC.2013.2295611) was proposed to ensure the correctness of the outsourced data. A distinctive feature of Panda is the support of data sharing and user revocation. Unfortunately, in this letter, we show that Panda is insecure in the sense that a cloud server can hide data loss without being detected. Specifically, we show that even some stored file blocks have been lost, the server is able to generate a valid proof by replacing a pair of lost data block and its signature with another block and signature pair. We also provide a solution to the problem while preserving all the desirable features of the original protocol.
Published in: IEEE Transactions on Services Computing ( Volume: 8, Issue: 6, 01 Nov.-Dec. 2015)
Page(s): 998 - 999
Date of Publication: 08 September 2014

ISSN Information:


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