
upright=1.4|thumb|The same image viewed by white, blue, green, and red lights reveals different hidden numbers.
upright=1.4|thumb|The same image viewed by white, blue, green, and red lights reveals different hidden numbers.
Steganography ( ) is the practice of representing information within another message or physical object, in such a manner that the presence of the concealed information would not be evident to an unsuspecting person's examination. In computing and electronic contexts, a computer file, message, image, or video is concealed within another file, message, image, or video. Generally, the hidden messages appear to be (or to be part of) something else: images, articles, shopping lists, or some other cover text. For example, the hidden message may be in invisible ink between the visible lines of a private letter. Some implementations of steganography that lack a formal shared secret are forms of security through obscurity, while key-dependent steganographic schemes try to adhere to Kerckhoffs's principle.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).