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In an accountable storage service, actions on data are concluded to the original actors so that a faulty actor cannot avoid penalty, and actors are protected against false accusations of guilt. In this paper, the authors propose an efficient scheme for mutual accountability of data integrity between users and providers in cloud storage service. Their scheme relies on a Trusted Third Party (TTP) to generate indisputable tamper-resistant attestations stored in the cloud, and holds both users and providers accountable for their actions on cloud data.
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