This document proposes a system for privacy preserving public auditing for secure cloud storage. It summarizes the existing system of cloud data storage and its disadvantages like lack of data integrity and privacy. The proposed system allows for public auditing of cloud data storage by an independent third party auditor to ensure data integrity and privacy while reducing the online burden on users. Key aspects of the proposed system include public auditability, storage correctness, privacy preservation, batch auditing and lightweight operation. The document also includes module descriptions and UML diagrams of the use case diagram, activity diagram and sequence diagram.

1. Privacy Preserving
public auditing
for secure cloud storage
Bhanu Priyanka
Syed Mustaq
Shaik Nayeem
Anuhya
Guide: Y.V.V.N Vara Prasad
M.Tech.,(Ph.D), M.I.E.T.E., M.I.S.T.E
Assoc.Professor
Batch no: 14

2. What is Cloud Computing?
Cloud Computing is the delivery of
computing as a service rather than a product,
by sharing resources.

3. Why to use Cloud Computing?
• Reduction of costs
• Universal access
• Up-to-date software
• Choice of applications
• Potential to be greener and more
economical
• Flexibility

5. Services Of Cloud Computing

6. Existing System
Since cloud service providers (CSP) are separate
administrative entities, data outsourcing is actually
relinquishing user’s ultimate control over the fate of their
data. As a result, the correctness of the data in the cloud
is being put at risk due to the following reasons.
First of all, although the infrastructures under the cloud
are much more powerful and reliable than personal
computing devices, they are still facing the broad range
of both internal and external threats for data integrity

7. Architecture
Cloud
user
Cloud
service
provider
TPA
Sends data to cloud
Audit the data
Acknowledgment to user

8. Disadvantages of Existing System
• Data integrity
• Unfaithfully towards the cloud users regarding
their outsourced data status
• Expensiveness in I/O and transmission cost
• Late to Recover the data loss or damage
• Unauthorized data leakage
• Privacy

9. Proposed System
• To fully ensure the data integrity and save the cloud
users’ computation resources as well as online burden, it
is of critical importance to enable public auditing service
for cloud data storage, so that users may resort to an
independent third party auditor (TPA) to audit the
outsourced data when needed.
• The TPA, who has expertise and capabilities that users
do not, can periodically check the integrity of all the data
stored in the cloud on behalf of the users, which provides
a much more easier and affordable way for the users to
ensure their storage correctness in the cloud.

10. Advantages of proposed system
• Public Auditability
• Storage Correctness
• Privacy Preserving
• Batch Auditing
• Lightweight

12. MODULE DESCRIPTION
• Public audit ability for storage correctness
assurance
• Dynamic data operation support
• Block less verification
• Dynamic Data Operation with Integrity
Assurance
• Batch Auditing for Multi-client Data

13. UML DIAGRAM
• Use Case Diagram
• Activity Diagram
• Sequence Diagram

14. Usecase Diagram
ADMIN
USER
AUDITOR
File Upload
Key from email
View s All User
Data
Accept data
View user Data
View Auditing Details
File Download
Reject Data
Send alert

15. Activity Diagram
File Upload
ADMIN LOGIN
Start
End Process
View Auditing Data
Details
USER LOGI N
AUDITOR LOGIN
View All User Data
Accept or reject data
Audit status
File Download
View user details
Send alert

16. Sequence Diagram

17. Thank you…