Abstract:  Objective To authenticate digital photos by EXIF information. Methods Original data in Exif were examined using relevant softwares. Results If the original data in EXIF were changed， the digital photos had been modified. Conclusion The original data in EXIF can be used to authenticate digital photos.

Key words: digital photos, EXIF information, authentication of digital photo

摘要： 目的 通过对数码照片的Exif信息检查，判断数码照片的真伪。方法 通过相关软件工具查看Exif信息中的元数据。结果 如果Exif信息中的元数据已被改动，则数码照片已被修改。结论 Exif信息中的元数据可作为判断数码照片真伪的检测要素之一。

关键词: 数码照片, Exif信息, 数码照片取证