XOR reformed paillier encryption method with secure de-duplication for image scaling and cropping in reduced cloud storagez

Abstract

In this modern world, most of people are using cloud computing due to its accessibility. Users are uploading plenty of images to the cloud every day. But still, data confidentiality is the major issue for the cloud storage. This paper proposes a new method of image encryption scheme with less storage in the cloud. The proposed method performs double encryption with de-duplication over the images for better security and also reduces the storage overhead problem using the scaling and cropping operation. In the first level, the modified Paillier encryption technique is used and an XOR encryption takes place in the second phase. After that, a secure block-level image de-duplication technique is performed to eliminate the identical images and protect the image confidentiality. The simulation result exhibits that the proposed encryption with secure de-duplication outperforms other state-of-art approaches with respect to the performance metrics like accuracy, sensitivity, specificity, encryption quality and runtime. In terms of accuracy, the performance of proposed method is better of 8.1%, 7.2%, and 6.1% for image 1, 10.2%, 7.1%, and 6.1% for image 2, 8.4%, 6.2%, and 5.8% for image 3, and 8.3%, 6.2%, and 5.6% for image 4 when compared with other three existing research works.