Active Authentication
Definition
Authentication that depends on a signal deliberately inserted at capture time, such as a digital watermark, a cryptographic hash, or a manufacturer's in-camera signature.
Related terms
- Copy-Move Forgery
- An intra-image manipulation in which a patch copied from one location within the image is pasted over another location in the same...
- Image Authentication
- The process of evaluating whether an image faithfully represents the scene it purports to show, using analysis of pixel statistics, file metadata,...
- Image Verification
- The narrower task of confirming that a specific file originated from a claimed device or has not changed since capture, often relying...
- Passive (Blind) Authentication
- Analysis that relies solely on traces in the existing image data, with no pre-embedded signal. Methods include noise analysis, JPEG artefact examination,...
- Splicing
- An inter-image manipulation in which content from one or more external images is inserted into a target image. Splicing introduces cross-boundary inconsistencies...
Explained in
- Image Authentication: Principles and the Forgery TaxonomyAuthentication that depends on a signal deliberately inserted at capture time, such as a digital watermark, a cryptographic hash, or a manufacturer's in-camera...