基于模糊广义去重的图像轻量安全云存储方法

doi:10.3969/j.issn.0255-8297.2024.05.005

摘要/Abstract

摘要： 广义去重是实现云数据安全去重的一种重要手段。现有的广义去重方法仅支持精确去重，且无法与图像加密技术有机结合。而图像加密技术本身也将给用户带来巨大的计算开销。针对以上挑战，本文提出一种基于模糊广义去重的图像轻量级安全云存储方法。首先对图像数据开展整数小波变换并提取低频分量作为基，高频分量作为偏移量，通过提出一种基于异或的轻量级加密算法，把图像的机密性保护方法与广义去重技术有机结合。此外，本文还对偏移量进行云端模糊去重，使得云端仅保存高度相似的偏移量数据的单个副本，实现了图像云数据的模糊广义去重。在相关的图像数据集上开展实验，结果表明在实现安全性的前提下，本文所提方法在改善通信效率和存储效率上有显著效果。

关键词: 图像去重, 侧信道攻击, 云存储, 模糊去重, 图像加密

Abstract: Generalized deduplication is an effective technique to achieve secure deduplication for cloud images. However, the existing generalized deduplication technique only supports precise deduplication and cannot be integrated with encryption technique for images. Furthermore, image encryption techniques impose substantial computational overhead on clients. To deal with the above challenges, we propose a fuzzy generalized deduplicationbased lightweight secure cloud storage method for images. Firstly, the integer wavelet transform is applied to extract the low-frequency components as bases and high-frequency ones as deviations. By proposing a lightweight encryption scheme based on XOR, the confidentiality protection for images is effectively integrated with the generalized deduplication technique. In addition, the proposed scheme also supports fuzzy deduplication for deviations, ensuring that the cloud service provider only stored a single copy of highly similar deviations, thereby achieving fuzzy generalized deduplication for cloud images. Finally, we conduct experiments on related image datasets. The results show that the proposed scheme significantly improves both communication and storage efficiency while ensuring security.

Key words: image deduplication, side channel attacks, cloud storage, fuzzy deduplication, image encryption

中图分类号:

TP309.2

陈海欣, 唐鑫, 金路超, 付耀文, 周艺腾. 基于模糊广义去重的图像轻量安全云存储方法[J]. 应用科学学报, 2024, 42(5): 769-781.

CHEN Haixin, TANG Xin, JIN Luchao, FU Yaowen, ZHOU Yiteng. Fuzzy Generalized Deduplication Based on Lightweight Secure Cloud Storage Method for Images[J]. Journal of Applied Sciences, 2024, 42(5): 769-781.

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