Volume : 3, Issue : 3, OCT 2019


B. Hari Babu, D. Murali


With cloud data services, it is commonplace for data to be not only stored in the cloud, but also shared across multiple users. Unfortunately, the integrity of cloud data is subject to skepticism due to the existence of hardware/software failures and human errors. Several mechanisms have been designed to allow both data owners and public verifiers to efficiently audit cloud data integrity without retrieving the entire data from the cloud server. However, public auditing on the integrity of shared data with these existing mechanisms will inevitably reveal confidential information-identity privacy to public verifiers. In this paper, I propose a novel privacy-preserving mechanism that supports public auditing on shared data stored in the cloud. In particular, I exploit ring signatures to compute verification metadata needed to audit the correctness of shared data. With our mechanism, the identity of the signer on each block in shared data is kept private from public verifiers, who are able to efficiently verify shared data integrity without retrieving the entire file.


date sharing, web server, web pages, php syntax.

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  1. Wang, B. Li, and H. Li, “Oruta: Privacy-Preserving Public Auditing for Shared Data in the Cloud,” Proc. IEEE Fifth Int’l Conf. Cloud Computing, pp. 295-302, 2012.
  2. Armbrust, A. Fox, R. Griffith, A.D. Joseph, R.H. Katz, A. Konwinski, G. Lee, D.A. Patterson, A. Rabkin, I. Stoica, and M. Zaharia, “A View of Cloud Computing,” Comm. ACM, vol. 53, no. 4, pp. 50-58, Apr. 2010.
  3. Ren, C. Wang, and Q. Wang, “Security Challenges for the Public Cloud,” IEEE Internet Computing, vol. 16, no. 1, pp. 69-73, 2012.
  4. Song, E. Shi, I. Fischer, and U. Shankar, “Cloud Data Protection for the Masses,” Computer, vol. 45, no. 1, pp. 39-45, 2012.
  5. Wang, Q. Wang, K. Ren, and W. Lou, “Privacy-Preserving Public Auditing for Data Storage Security in Cloud Computing,” Proc. IEEE INFOCOM, pp. 525-533, 2010.
  6. Wang, M. Li, S.S. Chow, and H. Li, “Computing Encrypted Cloud Data Efficiently under Multiple Keys,” Proc. IEEE Conf. Comm. and Network Security (CNS ’13), pp. 90-99, 2013.
  7. Rivest, A. Shamir, and L. Adleman, “A Method for Obtaining Digital Signatures and Public Key Cryptosystems,” Comm. ACM, vol. 21, no. 2, pp. 120-126, 1978.
  8. The MD5 Message-Digest Algorithm (RFC1321). https://tools. ietf.org/html/rfc1321, 2014.
  9. Ateniese, R. Burns, R. Curtmola, J. Herring, L. Kissner, Z. Peterson, and D. Song, “Provable Data Possession at Untrusted Stores,” Proc. 14th ACM Conf. Computer and Comm. Security (CCS ’07), pp. 598-610, 2007.
  10. Shacham and B. Waters, “Compact Proofs of Retrievability,” Proc. 14th Int’l Conf. Theory and Application of Cryptology and Information Security: Advances in Cryptology (ASIACRYPT ’08), pp. 90-107, 2008.
  11. Erway, A. Kupcu, C. Papamanthou, and R. Tamassia, “Dynamic Provable Data Possession,” Proc. 16th ACM Conf. Computer and Comm. Security (CCS’09), pp. 213-222, 2009.
  12. Wang, C. Wang, J. Li, K. Ren, and W. Lou, “Enabling Public Verifiability and Data Dynamic for Storage Security in Cloud Computing,” Proc. 14th European Conf. Research in Computer Security (ESORICS’09), pp. 355-370, 2009.
  13. Wang, Q. Wang, K. Ren, and W. Lou, “Ensuring Data Storage Security in Cloud Computing,” Proc. 17th Int’l Workshop Quality of Service (IWQoS’09), pp. 1-9, 2009.
  14. Chen, R. Curtmola, G. Ateniese, and R. Burns, “Remote Data Checking for Network Coding-Based Distributed Storage Systems,” Proc. ACM Workshop Cloud Computing Security Workshop (CCSW’10), pp. 31-42, 2010.