Load Rebalancing with Improved Security for Distributed File Systems in Cloud

Abstract

This paper describes a Hadoop based load rebalancing algorithm along with a procedure for improving the security by using the cryptographic algorithms such as RSA and MD5. In a cloud computing environment, that contains large number of nodes, each of which having storage and processing capacities, failure is a norm and the nodes as well as the data may be upgraded, replaced, or added to the system resulting in load imbalance of the system. The load rebalancing algorithm can solve this issue. The security offered in cloud is very limited. So, for enhancing the security RSA and MD5 algorithms are incorporated to the system. Among the huge data those which need more security rather than just storing it are encrypted using RSA and checked periodically using MD5. Before encrypting using RSA the data is compressed, this improves speed of RSA. Replicas are stored in addition to recover from any distortion happening to data.