Self-Certified Public Auditing for Data Integrity in Cloud Storage

In cloud storage, after data file is outsourced, data owner no longer physical controls over the storage. To efficiently verify these data integrity, several public auditing schemes for data integrity checking were proposed to achieve data integrity checking. The existing auditing schemes makes that the auditor executes high computation to check data integrity. It might become a burden for a lot of data owner. To solve the above problem, we propose a novel public auditing scheme with public verifiability and constant communication cost based on self-certified signature scheme in this paper. Thorough analysis shows that our proposed scheme is secure and efficient. The security of our scheme is based on the fixed inversion problem (FI) of the bilinear map and the inversion of hash function.