In today’s fastest-growing life, all need to be more secure in terms of advancement in technology. Everything is going to be a part of digitization. In this, almost everyone is using online storage for storing their personal and important and official secret information. To sustain integrity there should be trustworthy services must be carried out in the back end. Online security has been provided for the cloud with a very powerful privacy system. But still, there is a possibility of different interrupts in terms of stacks like DoS, Denial of Service attack can happen any time to break the normal flow of service. Henceforth, this paper will provide a strong security system for data storage with double encryption format and a more complex structure, for we will express the algorithm through the quantum cryptographic environment to use under the homomorphism technique of modern cryptography.