Towards the Design of a Secure and Fault Tolerant Cloud Storage in a Multi-Cloud Environment.

This paper addresses the problem of data security and fault tolerance in the Cloud. The application of the proposed model includes organizations, business groups, and establishments where the data are highly confidential and need to be kept in a very secure manner among a number of users. The paper recommends a model to enhance the security measure and a model to increase the fault tolerance capability. To increase the overall security, the security measure needs to be followed at the user side. The work is carried out on a multi-cloud environment where the data are encrypted, split, and stored. The storage details are held by the owner in a file that is encrypted and the key is retained by a set of owners using secret sharing scheme. The model would work continuously when one of the Cloud Service Providers goes in for a failure and another model has been proposed which would work when two Cloud Service Providers go down. The method increases the security and provides improved fault tolerance. [ABSTRACT FROM PUBLISHER]