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Privacy-Preserving Public Auditing For Secure Cloud Storage
ABSTRACT:
Using cloud storage, users can remotely store their data and enjoy the on-demand high-quality
applications and services from a shared pool of configurable computing resources, without the
burden of local data storage and maintenance. However, the fact that users no longer have
physical possession of the outsourced data makes the data integrity protection in cloud
computing a formidable task, especially for users with constrained computing resources.
Moreover, users should be able to just use the cloud storage as if it is local, without worrying
about the need to verify its integrity. Thus, enabling public auditability for cloud storage is of
critical importance so that users can resort to a third-party auditor (TPA) to check the integrity
of outsourced data and be worry free. To securely introduce an effective TPA, the auditing
process should bring in no new vulnerabilities toward user data privacy, and introduce no
additional online burden to user. In this paper, we propose a secure cloud storage system
supporting privacy-preserving public auditing. We further extend our result to enable the TPA
to perform audits for multiple users simultaneously and efficiently. Extensive security and
performance analysis show the proposed schemes are provably secure and highly efficient. Our
preliminary experiment conducted on Amazon EC2 instance further demonstrates the fast
performance of the design.
GLOBALSOFT TECHNOLOGIES
IEEE PROJECTS & SOFTWARE DEVELOPMENTS
IEEE FINAL YEAR PROJECTS|IEEE ENGINEERING PROJECTS|IEEE STUDENTS PROJECTS|IEEE
BULK PROJECTS|BE/BTECH/ME/MTECH/MS/MCA PROJECTS|CSE/IT/ECE/EEE PROJECTS
CELL: +91 98495 39085, +91 99662 35788, +91 98495 57908, +91 97014 40401
Visit: www.finalyearprojects.org Mail to:ieeefinalsemprojects@gmail.com
EXISTING SYSTEM:
In the Existing systems, the notion of public auditability has been proposed in the context of
ensuring remotely stored data integrity under different system and security models. Public
auditability allows an external party, in addition to the user himself, to verify the correctness of
remotely stored data. However, most of these schemes do not consider the privacy protection of
users’ data against external auditors. Indeed, they may potentially reveal user’s data to auditors.
This severe drawback greatly affects the security of these protocols in cloud computing. From
the perspective of protecting data privacy, the users, who own the data and rely on TPA just for
the storage security of their data, do not want this auditing process introducing new
vulnerabilities of unauthorized information leakage toward their data security.
DISADVANTAGES OF EXISTING SYSTEM:
 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.
 Second, there do exist various motivations for CSP to behave unfaithfully toward the cloud
users regarding their outsourced data status.
 In particular, simply downloading all the data for its integrity verification is not a practical
solution due to the expensiveness in I/O and transmission cost across the network. Besides, it
is often insufficient to detect the data corruption only when accessing the data, as it does not
give users correctness assurance for those unaccessed data and might be too late to recover
the data loss or damage.
 Encryption does not completely solve the problem of protecting data privacy against third-
party auditing but just reduces it to the complex key management domain. Unauthorized data
leakage still remains possible due to the potential exposure of decryption keys.
PROPOSED SYSTEM:
In this paper, we utilize the public key based homomorphic authenticator and uniquely integrate
it with random mask technique to achieve a privacy-preserving public auditing system for cloud
data storage security while keeping all above requirements in mind. To support efficient
handling of multiple auditing tasks, we further explore the technique of bilinear aggregate
signature to extend our main result into a multi-user setting, where TPA can perform multiple
auditing tasks simultaneously. Extensive security and performance analysis shows the proposed
schemes are provably secure and highly efficient. We also show how to extent our main scheme
to support batch auditing for TPA upon delegations from multi-users.
ADVANTAGES OF PROPOSED SYSTEM:
1. Public auditability: to allow TPA to verify the correctness of the cloud data on demand
without retrieving a copy of the whole data or introducing additional online burden to the
cloud users.
2. Storage correctness: to ensure that there exists no cheating cloud server that can pass the
TPA’s audit without indeed storing users’ data intact.
3. Privacy preserving: to ensure that the TPA cannot derive users’ data content from the
information collected during the auditing process.
4. Batch auditing: to enable TPA with secure and efficient auditing capability to cope with
multiple auditing delegations from possibly large number of different users
simultaneously
5. Lightweight: to allow TPA to perform auditing with minimum communication and
computation overhead.
MODULES:
1. Privacy-Preserving Public Auditing Module:
Homomorphic authenticators are unforgeable verification metadata generated from
individual data blocks, which can be securely aggregated in such a way to assure an
auditor that a linear combination of data blocks is correctly computed by verifying only
the aggregated authenticator. Overview to achieve privacy-preserving public auditing, we
propose to uniquely integrate the homomorphic authenticator with random mask
technique. In our protocol, the linear combination of sampled blocks in the server’s
response is masked with randomness generated by a pseudo random function (PRF). The
proposed scheme is as follows:
Setup Phase
Audit Phase
2. Batch Auditing Module:
With the establishment of privacy-preserving public auditing in Cloud Computing, TPA
may concurrently handle multiple auditing delegations upon different users’ requests.
The individual auditing of these tasks for TPA can be tedious and very inefficient. Batch
auditing not only allows TPA to perform the multiple auditing tasks simultaneously, but
also greatly reduces the computation cost on the TPA side.
3. Data Dynamics Module:
Hence, supporting data dynamics for privacy-preserving public risk auditing is also of
paramount importance. Now we show how our main scheme can be adapted to build
upon the existing work to support data dynamics, including block level operations of
modification, deletion and insertion. We can adopt this technique in our design to achieve
privacy-preserving public risk auditing with support of data dynamics.
SYSTEM ARCHITECTURE:
ALGORITHMS USED:
SYSTEM CONFIGURATION:-
HARDWARE CONFIGURATION:-
 Processor - Pentium –IV
 Speed - 1.1 Ghz
 RAM - 256 MB(min)
 Hard Disk - 20 GB
 Key Board - Standard Windows Keyboard
 Mouse - Two or Three Button Mouse
 Monitor - SVGA
SOFTWARE CONFIGURATION:-
 Operating System : Windows XP
 Programming Language : JAVA
 Java Version : JDK 1.6 & above.
REFERENCE:
Cong Wang, Member, IEEE, Sherman S.M. Chow, Qian Wang, Member, IEEE, Kui Ren,
Senior Member, IEEE, and Wenjing Lou, Senior Member, IEEE “Privacy- Preserving Public
Auditing for Secure Cloud Storage”, IEEE TRANSACTIONS ON COMPUTERS, VOL. 62,
NO. 2, FEBRUARY 2013
OUING
DOMAIN: WIRELESS NETWORK PROJECTS

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JAVA 2013 IEEE CLOUDCOMPUTING PROJECT Privacy preserving public auditing for secure cloud storage

  • 1. CL Privacy-Preserving Public Auditing For Secure Cloud Storage ABSTRACT: Using cloud storage, users can remotely store their data and enjoy the on-demand high-quality applications and services from a shared pool of configurable computing resources, without the burden of local data storage and maintenance. However, the fact that users no longer have physical possession of the outsourced data makes the data integrity protection in cloud computing a formidable task, especially for users with constrained computing resources. Moreover, users should be able to just use the cloud storage as if it is local, without worrying about the need to verify its integrity. Thus, enabling public auditability for cloud storage is of critical importance so that users can resort to a third-party auditor (TPA) to check the integrity of outsourced data and be worry free. To securely introduce an effective TPA, the auditing process should bring in no new vulnerabilities toward user data privacy, and introduce no additional online burden to user. In this paper, we propose a secure cloud storage system supporting privacy-preserving public auditing. We further extend our result to enable the TPA to perform audits for multiple users simultaneously and efficiently. Extensive security and performance analysis show the proposed schemes are provably secure and highly efficient. Our preliminary experiment conducted on Amazon EC2 instance further demonstrates the fast performance of the design. GLOBALSOFT TECHNOLOGIES IEEE PROJECTS & SOFTWARE DEVELOPMENTS IEEE FINAL YEAR PROJECTS|IEEE ENGINEERING PROJECTS|IEEE STUDENTS PROJECTS|IEEE BULK PROJECTS|BE/BTECH/ME/MTECH/MS/MCA PROJECTS|CSE/IT/ECE/EEE PROJECTS CELL: +91 98495 39085, +91 99662 35788, +91 98495 57908, +91 97014 40401 Visit: www.finalyearprojects.org Mail to:ieeefinalsemprojects@gmail.com
  • 2. EXISTING SYSTEM: In the Existing systems, the notion of public auditability has been proposed in the context of ensuring remotely stored data integrity under different system and security models. Public auditability allows an external party, in addition to the user himself, to verify the correctness of remotely stored data. However, most of these schemes do not consider the privacy protection of users’ data against external auditors. Indeed, they may potentially reveal user’s data to auditors. This severe drawback greatly affects the security of these protocols in cloud computing. From the perspective of protecting data privacy, the users, who own the data and rely on TPA just for the storage security of their data, do not want this auditing process introducing new vulnerabilities of unauthorized information leakage toward their data security. DISADVANTAGES OF EXISTING SYSTEM:  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.  Second, there do exist various motivations for CSP to behave unfaithfully toward the cloud users regarding their outsourced data status.  In particular, simply downloading all the data for its integrity verification is not a practical solution due to the expensiveness in I/O and transmission cost across the network. Besides, it is often insufficient to detect the data corruption only when accessing the data, as it does not give users correctness assurance for those unaccessed data and might be too late to recover the data loss or damage.  Encryption does not completely solve the problem of protecting data privacy against third- party auditing but just reduces it to the complex key management domain. Unauthorized data leakage still remains possible due to the potential exposure of decryption keys.
  • 3. PROPOSED SYSTEM: In this paper, we utilize the public key based homomorphic authenticator and uniquely integrate it with random mask technique to achieve a privacy-preserving public auditing system for cloud data storage security while keeping all above requirements in mind. To support efficient handling of multiple auditing tasks, we further explore the technique of bilinear aggregate signature to extend our main result into a multi-user setting, where TPA can perform multiple auditing tasks simultaneously. Extensive security and performance analysis shows the proposed schemes are provably secure and highly efficient. We also show how to extent our main scheme to support batch auditing for TPA upon delegations from multi-users. ADVANTAGES OF PROPOSED SYSTEM: 1. Public auditability: to allow TPA to verify the correctness of the cloud data on demand without retrieving a copy of the whole data or introducing additional online burden to the cloud users. 2. Storage correctness: to ensure that there exists no cheating cloud server that can pass the TPA’s audit without indeed storing users’ data intact. 3. Privacy preserving: to ensure that the TPA cannot derive users’ data content from the information collected during the auditing process. 4. Batch auditing: to enable TPA with secure and efficient auditing capability to cope with multiple auditing delegations from possibly large number of different users simultaneously 5. Lightweight: to allow TPA to perform auditing with minimum communication and computation overhead. MODULES: 1. Privacy-Preserving Public Auditing Module:
  • 4. Homomorphic authenticators are unforgeable verification metadata generated from individual data blocks, which can be securely aggregated in such a way to assure an auditor that a linear combination of data blocks is correctly computed by verifying only the aggregated authenticator. Overview to achieve privacy-preserving public auditing, we propose to uniquely integrate the homomorphic authenticator with random mask technique. In our protocol, the linear combination of sampled blocks in the server’s response is masked with randomness generated by a pseudo random function (PRF). The proposed scheme is as follows: Setup Phase Audit Phase 2. Batch Auditing Module: With the establishment of privacy-preserving public auditing in Cloud Computing, TPA may concurrently handle multiple auditing delegations upon different users’ requests. The individual auditing of these tasks for TPA can be tedious and very inefficient. Batch auditing not only allows TPA to perform the multiple auditing tasks simultaneously, but also greatly reduces the computation cost on the TPA side. 3. Data Dynamics Module: Hence, supporting data dynamics for privacy-preserving public risk auditing is also of paramount importance. Now we show how our main scheme can be adapted to build upon the existing work to support data dynamics, including block level operations of modification, deletion and insertion. We can adopt this technique in our design to achieve privacy-preserving public risk auditing with support of data dynamics.
  • 6. SYSTEM CONFIGURATION:- HARDWARE CONFIGURATION:-  Processor - Pentium –IV  Speed - 1.1 Ghz  RAM - 256 MB(min)  Hard Disk - 20 GB  Key Board - Standard Windows Keyboard  Mouse - Two or Three Button Mouse  Monitor - SVGA SOFTWARE CONFIGURATION:-  Operating System : Windows XP  Programming Language : JAVA  Java Version : JDK 1.6 & above.
  • 7. REFERENCE: Cong Wang, Member, IEEE, Sherman S.M. Chow, Qian Wang, Member, IEEE, Kui Ren, Senior Member, IEEE, and Wenjing Lou, Senior Member, IEEE “Privacy- Preserving Public Auditing for Secure Cloud Storage”, IEEE TRANSACTIONS ON COMPUTERS, VOL. 62, NO. 2, FEBRUARY 2013 OUING DOMAIN: WIRELESS NETWORK PROJECTS