CONSISTENCY AND PRIVACY BASED REPLICATION SYSTEM IN SECURE SHARING FRAMEWORK

Computer Engineering

In Big data, users can outsource their computation and cost-effective manner to servers (also called clouds data storage) using Internet. Clouds can provide several types of services like applications infrastructures risk and platforms to help developers write applications (e.g., Amazon’s S3, Windows Azure). Much of the data stored in clouds is highly sensitive. Security and privacy are thus very important issues in cloud data storage. In one hand, the user should authenticate itself before initiating any transaction, and on the other user, it must be ensured that the cloud accessing for cryptographic role-based access control (RBAC). The cloud can hold the user accountable for the data it outsources, and likewise, the cloud itself accountable for the services it provides. The validity of the user who stores the data is also verified. Cloud servers are prone to Hierarchical RBAC system, where a storage server can fail in arbitrary ways. The cloud is also prone to data modification and server colluding user behavior privileges’. In server colluding cloud storages, the adversary can compromise storage servers, so that it can modify data files as long as they are internally consistent. To provide secure data storage, the data needs to be encrypted. However, the data is often modified and this dynamic property needs to be taken into account while designing efficient secure storage techniques. So analyze efficient search on encrypted data is also an important concern in clouds. The clouds should not know the query but should be able to return the records that satisfy the query. This is achieved by means of searchable encryption. Access control in clouds is gaining attention because it is important that only authorized users have access to valid service. A huge amount of information is being stored in the cloud, and much of this is sensitive information. Care should be taken to ensure access control of this sensitive information which can often related to health, important documents. So we implement decentralized access control and user revocation schemes to improve security and privacy in real time cloud environments.

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