Source identification
Definition
The branch of authentication that determines whether a recording originates from a claimed device, person, or system. Methods include Photo Response Non-Uniformity analysis, microphone fingerprinting, codec fingerprinting, and Electric Network Frequency analysis.
Related terms
- C2PA (Coalition for Content Provenance and Authenticity)
- An open technical standard that embeds cryptographically signed provenance assertions into media files at the point of capture or editing. A C2PA...
- Deepfake
- Synthetic or AI-manipulated media in which a person's likeness, voice, or both are generated or substituted using machine learning methods. Detection relies...
- Integrity verification
- The branch of authentication that determines whether a recording's content has been altered after original capture. Methods include metadata consistency checks, compression...
- Photo Response Non-Uniformity (PRNU)
- A fixed-pattern noise component caused by microscopic sensitivity differences between individual sensor pixels. PRNU is deterministic and camera-specific, making it a sensor...
- Steganography
- Concealing one file inside another in a way that hides the existence of the hidden file. LSB image manipulation, JPEG DCT coefficient...
Explained in
- Media Authentication FundamentalsThe branch of authentication that determines whether a recording originates from a claimed device, person, or system. Methods include Photo Response Non-Unifor...