Cloud Computing Security Using RSA & AES

Presents Hybrid (RSA & AES) encryption algorithm to safeguard data security in Cloud. Security being the most important factor in cloud computing has to be deal with great precautions. This paper mainly focuses on the following key tasks:
1. Secure Upload of knowledge on cloud such even the administrator is unaware of the contents.
2. Secure Download of data in such a way that the integrity of data is maintained.
3. Proper usage and sharing of the general public , private and secret keys involved for encryption and decryption.
The use of one key for both encryption and decryption is extremely prone to malicious attacks. But in hybrid algorithm, this problem is solved by the utilization of three separate keys each for encryption as well as decryption. Out of the three keys one is the public key, which is made available to all, the second one is the private key which lies only with the user. In this way, both the secure upload as well as secure download of the data is facilitated using the two respective keys. Also, the key generation technique used in this paper is unique in its own way. This has helped in avoiding any chances of repeated or redundant key.