• J.David Sukeerthi Kumar
• V.P.Bharathi
• P.Alekhya
• K.Hemantha Sandhya
• B.Latha Shravani , M.Asmitha

Cloud storage services provide several significant benefits for managing and deploying the data by users. But there are some security concerns. One among them is data integrity. Usually, a third-party auditor is employed to verify the data integrity on behalf of the users. However, these schemes are vulnerable to some procrastinating auditors who may delay the verifications. Basically, these schemes are constructed on the public key infrastructure (PKI), and they face the problem of certificate management. This paper focuses on certificateless public verification scheme against procrastinating auditors (CPVPA) by using block chain technology. Main idea is to allow the auditors to verify each transaction and record them into a block chain. Basically, transactions on the block chain are time-sensitive; the verification is going to be time-stamped after the corresponding transaction is recorded. Hence, it ensures the users to know whether the verifications are done at the prescribed time. In addition to this, CPVPA is built on certificateless cryptography, and it is free from the problem of certificate management. We proposed rigorous proofs to explain the CPVPA security and evaluated the performance to show the efficiency of CPVPA.

Cloud computing, Data integrity, Certificateless public verification, Procrastinating auditors, Block chain.

"CERTIFICATELESS PUBLIC VERIFICATION SCHEME AGAINST PROCRASTINATING AUDITORS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 7, page no.1299-1303, July-2018, Available :http://www.jetir.org/papers/JETIR180Z081.pdf

"CERTIFICATELESS PUBLIC VERIFICATION SCHEME AGAINST PROCRASTINATING AUDITORS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 7, page no. pp1299-1303, July-2018, Available at : http://www.jetir.org/papers/JETIR180Z081.pdf