No abstract

Cryptographic algorithms play a vital role in providing security to the data and from malicious attacks. Now a day’s storing the data in the Cloud became essential for organizations to reduce the overhead of securing the data within the organization. “Stream ciphers” are more vulnerable to attacks when compared to “Block Ciphers”. In this article we used java platform to evaluate and compare all the block cipher techniques used for converting plain text to cipher text and we have identified the best block cipher technique which can be used in cloud.

Cloud space to yourself is a one of the most considerable tentative issue in cloud computing as some of the clients are satisfied with existing policies or protocols where as rest of them are quite concerned with the aspects of corresponding security [IV].In order to enhance the security levels in this paper we have proposed a multilevel security scheme that provides more security than that of any type of the existing single level encryption based process. In particular the proposed technique ensures that only pre authorized users can only access the cloud data and the other advantage of our algorithm is faster and safer in multiple directions such as while performing uploading and downloading a specific file [X].