Lightweight and Privacy-Preserving Delegatable Proofs of Storage with Data Dynamics in Cloud Storage
Abstract
Storage Proof (POR or PDP) is a cryptographic tool that allows data owner or third-party auditor to audit the integrity of data stored remotely in a cloud storage server without keeping a local copy of data or downloading data back during auditing. Lightweight and Privacy-Preserving Delegatable We note that all existing publicly verifiable POS schemes suffer from a serious drawback: due to many expensive group exponentiation operations, it is extremely slow to calculate authentication tags for all data blocks.
Introduction
Since
Lightweight and Privacy-Preserving Delegatable Proofs of Storage with Data Dynamics in Cloud Storage Proofs of Retrievability (POR) and Provable Data Possession (PDP) are proposed in 2007, a great deal of research community effort is devoted to building proofs of storage schemes with more advanced features. The new features include public key verifiability, supporting dynamic operations (i.e. inserting / deleting / editing a data block), supporting multiple cloud servers, maintaining privacy against auditor, and supporting data sharing, etc.
System Configuration
H/W System Configuration
Speed : 1.1 GHz
RAM : 256 MB(min)
Hard Disk : 20 GB
Floppy Drive : 1.44 MB
Key Board : Standard Windows Keyboard
Mouse : Two or Three Button Mouse
Monitor : SVGA
S/W System Configuration
Platform : cloud computing
Operating system : Windows Xp,7,
Server : WAMP/Apache
Working on : Browser Like Firefox, IE
Conclusion
Free project on Lightweight and Privacy-Preserving Delegatable Proofs of Storage with Data Dynamics in Cloud Storage,We proposed a novel POS scheme which is lightweight and privacy preserving. On one side, the proposed scheme is as efficient as private key POS scheme, especially very efficient in authentication tag generation. On the other side, the proposed scheme supports third party auditor and can revoke an auditor at any time, close to the functionality of publicly verifiable POS scheme.
Compared to existing publicly verifiable POS scheme, our scheme improves the authentication tag generation speed by more than 100 times. Our scheme also prevents data leakage to the auditor during the auditing process. How to enable dynamic operations (e.g. inserting/deleting a data block) in our scheme is in future work.
