On the Security and Applicability of Fragile Camera Fingerprints

On the Security and Applicability of Fragile Camera Fingerprints
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论易碎相机指纹的安全性和适用性

DOI:
10.1007/978-3-030-29959-0_22
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
K. Rieck
K. Rieck
中科院分区:
--
文献类型:
--
作者:
E. Quiring;M. Kirchner;K. Rieck

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相机传感器噪声是数字图像取证中最可靠的设备特性之一,可实现图像与数码相机的独特链接。这种所谓的相机指纹产生了不同的应用,例如图像取证和身份验证。然而,如果图像是公开的,对手可以估计她的受害者的指纹,并将其植入虚假图像。脆弱相机指纹的概念通过利用数据访问的不对称性来解决这种攻击:虽然相机所有者总是可以从未压缩图像中访问完整的指纹,但对手通常可以访问压缩图像,因此只能访问截断的指纹。然而,这种防御的安全性尚未得到系统的探讨。本文首次对脆弱的摄像头指纹在攻击下进行了全面的分析。一系列的理论和实际测试表明,脆弱的相机指纹允许在对抗性环境中对常见压缩级别进行可靠的设备识别。
Camera sensor noise is one of the most reliable device characteristics in digital image forensics, enabling the unique linkage of images to digital cameras. This so-called camera fingerprint gives rise to different applications, such as image forensics and authentication. However, if images are publicly available, an adversary can estimate the fingerprint from her victim and plant it into spurious images. The concept of fragile camera fingerprints addresses this attack by exploiting asymmetries in data access: While the camera owner will always have access to a full fingerprint from uncompressed images, the adversary has typically access to compressed images and thus only to a truncated fingerprint. The security of this defense, however, has not been systematically explored yet. This paper provides the first comprehensive analysis of fragile camera fingerprints under attack. A series of theoretical and practical tests demonstrate that fragile camera fingerprints allow a reliable device identification for common compression levels in an adversarial environment.
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