A modified cryptographic approach for securing distributed data storage in cloud computing

STaaS (STorage As a Service) is a cloud model that gains popularity among both private users and business enterprises ensuring remote data storage providing giant and scalable cloud based storage spaces. The modified cryptographic approach makes use of the RSA algorithm along with Diffie-Hellman to increase the security of the encrypted data stored in cloud. The input file is split into two, in order to make the access of the whole data difficult, and the split data is encrypted using RSA and Diffie-Hellman before storing them into two different cloud accounts. The split data is then retrieved, and the retrieved cipher data is decrypted to get the original data. The split mechanism does not produce big overheads, and also assures data retrievability. Thus data stored in the cloud is more secured and it prevents cloud providers from directly reaching the cloud data.