• Midhat Bi Mehboob Shaikh
• Ms. Siddhi Naik

In today’s world, the very famed and pliable technology existing is Cloud Computing. It provides customers with less-efforts, quick-work, high-capability etc. in their work by providing them with its readily available services. The fields like industry, military, colleges etc. make huge use of Cloud Computing as it reduces their work load. Data uploading and retrieval from cloud is very easy and quick on user’s request. Being cloud such a famous data center, storage of data on cloud is still facing many issues. Many ways are addressed to get rid from these issues, cryptography and steganography techniques are one of those. As symmetric algorithm’s makes use of single key for both encode-decode process, single key usage is not effective for high level security to data. In this proposed system, the new security model is introduced using symmetric and asymmetric cryptography algorithms. This paper presents the interestingly new model of hybrid encryption to strengthen the security of cloud data. The use of a single key for encode-decode raises the chances of attacks on data. The proposed work which involves hybridization of RSA, AES, DES and RC2 algorithm’s, provides a solution to the security issue faced by cloud. In this proposed work, files to be shared are encrypted by more than one algorithm coupled with file splitting which is used for the secured communication between users and the servers. As a result, uploading of data as well as downloading is achieved in a secured fashion, to users using the two respective keys.

Cloud Computing, Data Storage, Privacy Preserving, Public Auditing.

"HYBRIDIZATION OF PUBLIC KEY CRYPTOGRAPHY TO SECURE FILE STORAGE ON CLOUD", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.151-156, June 2019, Available :http://www.jetir.org/papers/JETIR1906P22.pdf

"HYBRIDIZATION OF PUBLIC KEY CRYPTOGRAPHY TO SECURE FILE STORAGE ON CLOUD", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp151-156, June 2019, Available at : http://www.jetir.org/papers/JETIR1906P22.pdf