A Trust-Based Data Backup Method on the Cloud
Data backup method may trigger the problem of the security reduction owing to the same data versions stored in different IDCs. To deal with the problem, the paper proposes a trust-based data backup method on the cloud in which trust value is exploited as the foundation to decide that the replica should be stored to the most trusted nodes. Production node calculates the trust value combining with local trust value and mutual trust value before it carries out the operation of backup. The trusted third party(TTP) is introduced to calculate the local trust value. The production node evaluates the mutual trust value based on the interactive evaluation with the available backup nodes. The trust-based data backup method can guarantee that every replica will be stored on the most trusted node during the time nodes trust each other. The proof shows this method is feasible.
Keywordsdata backup trust model mutual trust the third trusted party
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