Efficient Identity-based Public Auditing Scheme for Cloud Storage from Lattice Assumption

In this paper, we propose a post-quantum secure cloud storage system supporting privacy-preserving public auditing scheme from lattice assumption. In our public auditing scheme, we introduce a third party auditor (TPA), which can efficiently audit the cloud storage data, bringing no additional on-line burden to the users. We utilize preimage sampleable functions to realize our lattice-based signature, thus can be considered as random masking to make sure the TPA can not recover the primitive data blocks of the users. Based on the inhomogeneous small integer solution assumption (ISIS), our public auditing scheme is proved secure against the data lost attacks and tamper attacks from the cloud service providers. To the best of our knowledge, we construct the first identity-based public auditing for secure cloud storage from lattice assumption, which is an interesting stepping stone in the post-quantum cryptographic communication.