Friday, August 22, 2014

Decentralized Access Control with Anonymous Authentication of Data Stored in Clouds



Decentralized Access Control with Anonymous Authentication of Data Stored in Clouds

ABSTRACT:
We propose a new decentralized access control scheme for secure data storage in clouds that supports anonymous authentication. In the proposed scheme, the cloud verifies the authenticity of the series without knowing the user’s identity before storing data. Our scheme also has the added feature of access control in which only valid users are able to decrypt the stored information. The scheme prevents replay attacks and supports creation, modification, and reading data stored in the cloud. We also address user revocation. Moreover, our authentication and access control scheme is decentralized and robust, unlike other access control schemes designed for clouds which are centralized. The communication, computation, and storage overheads are comparable to centralized approaches.

EXISTING SYSTEM:
Ø Existing work on access control in cloud are centralized in nature. Except and, all other schemes use ABE. The scheme in uses a symmetric key approach and does not support authentication. The schemes do not support authentication as well.
Ø It provides privacy preserving authenticated access control in cloud. However, the authors take a centralized approach where a single key distribution center (KDC) distributes secret keys and attributes to all users.
DISADVANTAGES OF EXISTING SYSTEM:
Ø The scheme in uses asymmetric key approach and does not support authentication.
Ø Difficult to maintain because of the large number of users that are supported in a cloud environment.

PROPOSED SYSTEM:
Ø We propose a new decentralized access control scheme for secure data storage in clouds that supports anonymous authentication.
Ø  In the proposed scheme, the cloud verifies the authenticity of the series without knowing the user’s identity before storing data.
Ø Our scheme also has the added feature of access control in which only valid users are able to decrypt the stored information.
Ø  The scheme prevents replay attacks and supports creation, modification, and reading data stored in the cloud.

ADVANTAGES OF PROPOSED SYSTEM:
Ø Distributed access control of data stored in cloud so that only authorized users with valid attributes can access them.
Ø Authentication of users who store and modify their data on the cloud.
Ø The identity of the user is protected from the cloud during authentication.
SYSTEM ARCHITECTURE:


SYSTEM REQUIREMENTS:
HARDWARE REQUIREMENTS:

Ø System                          :         Pentium IV 2.4 GHz.
Ø Hard Disk                      :         40 GB.
Ø Floppy Drive                 :         1.44 Mb.
Ø Monitor                         :         15 VGA Colour.
Ø Mouse                            :         Logitech.
Ø Ram                               :         512 Mb.



SOFTWARE REQUIREMENTS:

Ø Operating system           :         Windows XP/7.
Ø Coding Language :         JAVA/J2EE
Ø IDE                      :         Netbeans 7.4
Ø Database              :         MYSQL

REFERENCE:
Sushmita Ruj, Milos Stojmenovic, and Amiya Nayak, “Decentralized Access Control with Anonymous Authentication of Data Stored in Clouds”, IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS, VOL. 25, NO. 2, FEBRUARY 2014
  

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