图像流哈希的验证:用于内容验证的法医方法
1National Center for Media Forensics, University of Colorado Denver, Denver, Colorado, USA.
Journal of forensic sciences
|December 2, 2023
概括
法医检查员可以使用图像流哈希方法在转码期间验证数字图像的完整性. 实施拟议的标准控制可以显著减少错误,确保在法医科学中可靠的内容验证.
科学领域:
- 数字法医学数字法医学
- 多媒体分析分析.
- 信息安全 信息安全
背景情况:
- 法医最佳实践要求在转码过程中保持数字图像的完整性.
- 现有的方法缺乏可靠的验证来检测图像流的变化.
研究的目的:
- 为了验证用于法医图像分析的图像流哈希方法.
- 识别和解决图像流哈希方法的局限性.
主要方法:
- 在五种文件类型中对图像流哈希方法进行实验测试.
- 分析系统错误以确定因果关系.
- 开发和实施标准控制以减轻已识别的局限性.
主要成果:
- 最初的测试显示了显著的错误率,限制了该方法适用于五种文件类型中的三种类型.
- 错误因果分析发现了四个主要的方法限制.
- 实施拟议的标准控制措施使系统错误减少到可以忽略的水平.
结论:
- 图像流哈希方法对于法医内容验证是可行的.
- 有效使用需要实施建议的标准控制以减轻错误.
- 标准化控制对于维护数字取证中的数据完整性至关重要.
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