Steganalysis
Definition
The detection of steganographic content in carrier files, using statistical, machine-learning, or tool-signature methods to determine whether a file has been modified to hide a payload.
Related terms
- Blind steganalysis
- Detection without prior knowledge of the embedding algorithm. A classifier trained on images with and without payloads generalises across multiple tools.
- Embedding rate
- The payload size divided by the carrier capacity, usually expressed as bits per pixel. Detection difficulty decreases sharply at low embedding rates...
- False-positive rate (FPR)
- The proportion of clean (non-stego) files that a detector incorrectly flags as containing hidden data. High FPR increases investigator workload; it does...
- Rich model steganalysis (SRM)
- A feature-extraction approach that computes hundreds of statistical features from pixel-residual co-occurrence matrices and feeds them to an ensemble classifier such as...
- Targeted steganalysis
- Detection methods designed against a specific steganography tool or algorithm. Effective when the tool is known but fails against novel or unknown...
Explained in
- Steganalysis: Statistical Detection MethodsThe detection of steganographic content in carrier files, using statistical, machine-learning, or tool-signature methods to determine whether a file has been m...