Steganography
A technique for concealing the existence of information inside another carrier, distinct from cryptography which primarily protects message content.
Core Distinction
Steganography attempts to hide the existence of information. Cryptography primarily makes content unintelligible without the required key. They can be combined, but they provide different security properties.
Carrier and Robustness
Images, audio and other data structures can act as carriers. Whether hidden data survives resizing, compression, transcoding or metadata cleanup depends on the embedding method.
High payload capacity does not automatically imply low detectability or robustness.
Digital Forensics
Steganalysis can look for statistical anomalies, file-structure inconsistencies, unexpected entropy and content behavior. A suspicious score is evidence for further examination, not proof by itself.
An early application example from my archive is Köker GizliBilgi.