Proxy System with JPEG Bitstream-Based File-Size Preserving Encryption for Cloud Photo Streams

TL;DR

This paper introduces a proxy system that encrypts JPEG images in a way that preserves the original file size and format, enabling secure cloud storage without altering image dimensions or appearance.

Contribution

It presents a novel JPEG bitstream-based encryption method that maintains file size and format, enhancing security for cloud photo storage.

Findings

Effective in Google Photo and iCloud Photo cloud services

Preserves original JPEG file size and format

Securely encrypts images without quality loss

Abstract

In this paper, we propose a proxy system with JPEG bitstream-based file-size preserving encryption to securely store compressed images in cloud environments. The proposed system, which is settled between client's device and the Internet, allows us not only to have exact the same file size as that of original JPEG streams but also to maintain a predetermined image format. In an experiment, the proposed system is verified to be effective in two cloud photo steams: Google Photo and iCloud Photo.