This document summarizes a research paper that proposes a privacy-preserving public auditing scheme for regenerating-code-based cloud storage. Existing methods only allow private auditing by the data owner, but the proposed system utilizes a third-party auditor and semi-trusted proxy to check data integrity and repair failures on behalf of the data owner. This allows public auditing while maintaining security and reducing the online burden for data owners. The system takes advantage of the properties of regenerating codes to efficiently compute authenticators.

1. Privacy-Preserving Public Auditing for
Regenerating-Code-Based Cloud
Storage

2. TABLE OF CONTENTS
 Abstract
 Problem Definition
 Existing System
 Proposed System
 Hardware Requirements
 Software Requirements

3. ABSTRACT
• Existing remote checking methods for regenerating-coded data
only provide private auditing, requiring data owners to always
stay online and handle auditing, as well as repairing, which is
sometimes impractical.
• Here, we propose a public auditing scheme for the
regenerating-code-based cloud storage.

4. PROBLEM DEFINITION
• To protect outsourced data in cloud storage against
corruptions, adding fault tolerance to cloud storage together
with data integrity checking and failure reparation becomes
critical.
• Regenerating codes have gained popularity due to their lower
repair bandwidth while providing fault tolerance.

5. Existing System
• The integrity of outsourced data without a local copy have
been proposed under different system and security models up
to now.
• The most significant work among these studies are the PDP
(provable data possession) model and POR (proof of re-
trievability) model, which were originally proposed for the
single-server scenario by Ateniese et al. and Juels and Kaliski,
respectively.

6. DISADVANTAGES:
• Security is less.
• They are designed for private audit, only the data owner is
allowed to verify the integrity and repair the faulty servers.
• The auditing schemes in existing imply the problem that users
need to always stay online, which may impede its adoption in
practice, especially for long-term archival storage

7. PROPOSED SYSTEM
• we focus on the integrity verification problem in regenerating-
code-based cloud storage, especially with the functional repair
strategy.
• The data integrity and save the users’ computation resources
as well as online burden, we propose a public auditing scheme
for the regenerating-code-based cloud storage, in which the
integrity checking and regeneration (of failed data blocks and
authenticators) are implemented by a third-party auditor and a
semi-trusted proxy separately on behalf of the data owner.

8. Advantages:
• Security is high.
• Utilizing the linear subspace of the regenerating codes, the
authenticators can be computed efficiently.
• Besides, it can be adapted for data owners equipped with low
end computation devices (e.g. Tablet PC etc.) in which they
only need to sign the native blocks.

9. Software Requirements
• Operating System : Windows XP/XP2/XP7
• Front End : JAVA(JDBC,Servlet,JSP)
• Back End : MySQL 5.5
• Server : Apache Tomcat Server

10. Hardware Requirements
• Processor :Any Processor above 500 MHz
• Hard Disk :80 GB and above.
• Ram :512 MB and above.

11. THANK YOU