Published Paper Details:

Cloud computing is the on-demand availability of computing system resources, especially data storage and computing power, without direct active management by the user. Security is deemed to be the crucial aspect due to significance of the information stored in the cloud. So, the data management and the security should be reliable. The paper proposes a way to store information securely in the cloud, by splitting data into several chunks and store it on cloud in a manner that preserves data confidentiality, integrity and ensures availability. When the user uploads a file to the server, the file splits into four different server instances in encrypted form. The encryption is done by using Advanced Encryption Standard (AES) algorithm and stores the files in the cloud. The four encrypted files in the server instances combine into a single encrypted file and by using proxy re-encryption technique the file re-encrypted by using a key. While downloading the file, the service asks for a key which was sent to the user�s mail id by using Message Digest (MD5) algorithm. By using Advanced Encryption Standard (AES) algorithm, the file is converted into single decrypted file and downloaded by the user. This approach ensures the security and privacy of client sensitive information by storing data across single cloud, using AES algorithm, MD5 algorithm and proxy re-encryption techniques.