A Secure Group Sharing Scheme with Access Control for Cloud Data

Authors: Ayushi Dashore, Mohit Jain

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Abstract

Cloud computing is a new technology with respect to other technologies. Therefore every day we can see new advancements in cloud system. In this presented work the cloud computing is the main area of investigation. The basic idea of working with the cloud environment is to develop and design an enhance approach of secure data sharing and access control. In this context the different security models are explored and we find that the key management is the complex issue in cloud data sharing. Due to this the communication overhead and the computation overhead is increases. Therefore the proposed work is influenced to overcome the additional overhead of key management. The proposed approach provides a methodology that help to manage the access control and the sharing of files with the low computational and communication overheads. In order to design the proposed technique the ABE encryption technique is used. In this context the proposed technique is implemented in two major parts in first the authentication and authorization is managed. In addition of user’s attribute is developed. The computed user attribute is used in next module for encryption and file sharing. Thus this module includes the encryption process using SHA1, MD5 and 3DES. In next for communication of secure keys between all the parties the ECC algorithm is used that encrypt the secure key for decryption. The implementation of the proposed approach is performed using JAVA technology. After implementation the performance of the system is measured in terms of server response time, time complexity and space complexity. The results demonstrate the efficient and secure outcomes of the proposed system.

Introduction

Cloud computing is the long dreamed vision of computing as a utility, where data owners can remotely store their data. The basic service provided by the Cloud is Data Storage. However, it is a difficult task for sharing data in multi-owner manner where group admin and all group members can store and modify data while preserving data and identity privacy from an un-trusted cloud server, due to the frequent change of the membership. Many of the public cloud computing services have appeared for data storage in group applications. Two important problems that arise when sharing group data in public cloud are the privacy and security of group member’s data. Cloud service providers are separate administrative entities and users don’t have access to the cloud internal operational details. Because of the semi trust nature of cloud service provider, the traditional security technologies cannot be directly applied to the public cloud based group data sharing applications. So that Data sharing is increasingly important for many users and sometimes an essential requirement especially for industries. Sharing group resource among cloud users is a major problem, still the data privacy leak. Most of the traditional systems are use Group Key Management method for sharing Key Generation and distribution in the group member or users. Sometimes change to user one group to another group, the group key to enable authenticated users to access the files securely and efficiently is still a challenging problem. Here we are proposing a security framework for dynamic group data sharing that make accessible to data file in secure manner in public cloud environment.