Author(s): V. Shobhitha, C. Shoba Bindu, P. Dileep Kumar Reddy3

Cloud computing is an interesting technology which provides a platform to use remote sources to store user?s information, manage and exercise data, instead of local systems. There are many advantages from cloud computing and also some disadvantages, like it is not secure to keep the data on cloud because it is handled by cloud service provider. In this storage system, data is moving from one end to another end passing through many nodes which may cause Data Manipulation. There is a chance of illegal modifications for an encoded packet. That will spread all over network this is all because of router combines the received packets and polluted ones. This is also known as the pollution attack. To overcome this attack, this paper introduces the Homomorphic Schemes for Encryption and Decryption using Network Coding