Using block cipher for confidentiality of images in cloud-based systems

Abstract

This paper deals with outsourcing of computing to cloud servers where clients' images are computed and stored. It proposes a technique that obfuscates images before sending them to servers. Cloud servers can perform computation such as comparison on images without knowing the actual images. The proposed technique is expected to ensure confidentiality of images. In order to achieve this, we propose a block cipher-based approach that requires less overhead from servers but images are not disclosed to servers during processing. In this work, we are experimenting how to obfuscate images, and send them to cloud servers for processing such as comparing two images in terms of their similarity. Cloud servers can process images without 'seeing and knowing' the actual images. The approach reveals no meaningful information about images to servers.