“PRIVACY PRESERVING REPOSITORY FOR SOCIAL NETWORKING APPLICATION

ACROSS CLOUD”

P. R. PATIL COLLEGE OF ENGINEERING AND TECHNOLOGY

DEPARTMENT OF COMPUTER SCIENCESESSION-2014-15

Presented by Guided byMs. Pritam V. Kilor Prof. V. B. Bhagat

CONTENTS Introduction

Literature Review

Proposed Method

Conclusion and Future Work

INTRODUCTIONPrivacy is an important issue in cloud

computing,

With the development of internet technology, privacy preserving data publication has become one of the most important research topics

Security has been a serious issue of concern in the cloud.

SERVICES ON CLOUD

Infrastructure as a Service(IAAS)

Software as a Service(SAAS)

Platform as a Service(PAAS)

MOTIVATION The following are some of the major issues

related to security

• Server Access Security • Database Access Security

• Internet Access Security • Program Access Security • Data Privacy Security

Of the above mentioned security issues we are focusing on the data privacy security issue.

AIM AND SCOPE

Repository is beneficial in the following ways:

The data sharing services in the cloud possess the ability to update and control the access and usages of their shared data.

The sharing of data in the cloud is done based on the need-to-share principle.

The repository is limited to gathering data from data sharing services and combining the data to satisfy user’s requirements.

LITERATURE REVIEW

Bertino and Ferrari describe mechanisms for fine-grained encryption of parts of XML documents.

Hippocratic databases include mechanisms for preserving the privacy of the data they manage.

Their proposed architecture is based on the concept of associating privacy metadata

IBM Tivoli Privacy Manage provided mechanisms for defining fine grained privacy policies and associating them with data.

This approach addressed the privacy management problem purely from an access control perspective within a single enterprise.

Stephen S. Yau, gives a concept about warehouse for integrating data from various data sharing services

warehouse Central authorities

collects data from data sharing services based on users‘ integration requirements

Collects all the data from the data sharing services

capability of warehouse is controlled to computing the integration results required by users

central establishment have full control of the collected data

only reveal the results of the specified data integration demand

Central establishment will reveal all data

RC6 ALGORITHM

RC6 is an evolutionary improvement of RC5, designed to meet the requirements of the Advanced Encryption Standard (AES)

A version of RC6 is more accurately specified as RC6-w/r/b

The plaintext, is stored in four w-bit input registers called (A,B,C,D). Keys are being stored into an array S[0,...,2r + 3].

Features of RC6 include the use of four working registers instead of two.

Decryption works in a similar way as encryption, the difference is that cipher text is the input and plaintext is the output.

PROPOSED METHOD

The social networking applications have become very popular and commonly used by the users in the modern times.

The objectives of propose project work to preserve the privacy of the data while it is being shared by the user to the friends.

The sharing of the data can be done need-based.

OBJECTIVE OF PROPOSED SYSTEM: To preserve the privacy of user’s file using

RC6 algorithm.

To provide sharing of encrypted files among various groups.

To provide need based sharing by using TTL.

To provide security to the files from accessing by unauthorized user

Flow diagram for uploading files on repository

FLOW DIAGRAM FOR FILES SHARING BETWEEN USER AND GROUPS

The current dissertation work is divided into following phases: Database creation

Login / Signup Module

File Upload/Download Module

Creation of Groups/Joining Groups

File sharing between user and groups

Result evaluation and optimization of system

SNAPSHOTS:

Login form

SNAPSHOTS

Creation of group

SNAPSHOTS

joining of group

SNAPSHOTS

Uploading of files

SNAPSHOTS

File sharing

SNAPSHOTS

Download file

SNAPSHOTS

Group request

RESULT ANALYSIS Here we have calculated encryption time for

different file size using RC6. Comparison of RC6 with AES and Twofish

w.r.t. encryption time for 16-bytes key.File Name (file type )

 

File Size(KB)

Encryption time withRC6algo.(in ms)

Encryption time with AES algo.(in ms)[25]

Encryption time withTwofishalgo.(in ms)[25]

A.doc 712 85.912 232.5 229.65

B.pdf 649 77.746 205 214.625

C.jpg 656 75.763 224.5 232.75

CONCLUSION AND FUTURE WORK

Here we are trying to give an assurance to the clients that their data is secured in cloud server with the help of RC6 algorithm, and privacy of data is also maintained

Future research along this topic includes how to extend the expressiveness of specification language, enable repository to support more types of data integration operations.

References

1) Cong Wang, Sherman S.M. Chow, Qian Wang, KuiRen, and Wenjing Lou “Privacy-Preserving Public Auditing for Secure Cloud Storage”, IEEE Transactions On Computers, Vol. 62, No. 2, pp. 362 – 375, February 2013.

2) Yuan, Jiawei, and Shucheng Yu. "Privacy Preserving Back-Propagation Neural Network Learning Made Practical with Cloud Computing", IEEE Transactions on Parallel and Distributed Systems, Vol. 25, Issue 1, pp. 212 – 221, 2014.

3) Ranjita Mishra and Sanjit Kumar Dash,A Privacy Preserving Repository for Securing Data across the Cloud ―IEEE 978-1-4244-8679, 2011

4) Gurudayal Singh Bhandari, Abhishek Chauhan, “A Survey on Privacy Preservation in Cloud Computing ,” International Journal of Emerging Technology and Advanced Engineering” Volume 4, Issue 7, July 2014 ,pp.710-723

.5) Shrinivas, D. "Privacy-Preserving Public Auditing In Cloud Storage Security." International Journal of computer science and Information Technologies,ISSN: 0975-9646, vol. 2, no. 6, pp. 2691-2693

Thank You