Homomorphic Encryption for Data Security in Cloud Computing

Cloud computing is recent emerging Internet based technology in IT industry. With rapid development of cloud computing over Internet, security became major issue that garnered attention of researchers from academic as well as industry. Data Security is a great barrier in adaptation of cloud computing. Traditional standard encryption methods provide security to data in storage state and transmission state. But in processing state, performing operations on data require decryption of data. At this state data is available to cloud provider. Hence traditional encryption methods are not sufficient to secure data completely. In this paper, we discussed homomorphic encryption methods and their applications in cloud computing to secure data in processing state. Homomorphic encryption allows user to operate encrypted data directly without decryption.