计算机科学
加密
缩略图
云计算
JPEG格式
密文
云存储
计算机安全
客户端加密
动态加密
数据库
图像(数学)
计算机视觉
操作系统
作者
Charles V. Wright,Wu‐chi Feng,Feng Liu
标识
DOI:10.1145/2756601.2756618
摘要
With more and more data being stored in the cloud, securing multimedia data is becoming increasingly important. Use of existing encryption methods with cloud services is possible, but makes many web-based applications difficult or impossible to use. In this paper, we propose a new image encryption scheme specially designed to protect JPEG images in cloud photo storage services. Our technique allows efficient reconstruction of an accurate low-resolution thumbnail from the ciphertext image, but aims to prevent the extraction of any more detailed information. This will allow efficient storage and retrieval of image data in the cloud but protect its contents from outside hackers or snooping cloud administrators. Experiments of the proposed approach using an online selfie database show that it can achieve a good balance of privacy, utility, image quality, and file size.
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