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Hidden messages distributed, according to a certain rule or key, as smaller parts (e.g. words or letters) among other words of a less suspicious cover text. This particular form of steganography is called a null cipher. Messages written in Morse code on yarn and then knitted into a piece of clothing worn by a courier. [1]
Printer tracking dots, also known as printer steganography, DocuColor tracking dots, yellow dots, secret dots, or a machine identification code (MIC), is a digital watermark which many color laser printers and photocopiers produce on every printed page that identifies the specific device that was used to print the document.
The same image viewed by white, blue, green, and red lights reveals different hidden numbers. Steganography (/ ˌ s t ɛ ɡ ə ˈ n ɒ ɡ r ə f i / ⓘ STEG-ə-NOG-rə-fee) 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.
Hidden messages include backwards audio messages, hidden visual messages and symbolic or cryptic codes such as a crossword or cipher. Although there are many legitimate examples of hidden messages created with techniques such as backmasking and steganography, many so-called hidden messages are merely fanciful imaginings or apophany.
The post 36 Hidden Messages in Company Logos You See All the Time appeared first on Reader's Digest. They have hidden messages in their logos—here's what they are and what they mean.
The American one-dollar bill has been an enormous source of mystery for many years. While it is something that nearly every American has come into contact with over and over again, there still ...
Enigma machine messages Solved (broken by Polish and Allied cryptographers between 1932 and 1945) 1939 D'Agapeyeff cipher: Unsolved 1939–1945 Purple cipher machine messages Solved (broken by Allied cryptographers in 1940) 1941 Lorenz SZ42 machine cipher messages Solved (broken by Allied cryptographers in 1942) 1944 Pigeon NURP 40 TW 194 ...
We come in contact with it all the time, but the markings on the one-dollar bill remain shrouded in mystery. Until now. 1. The Creature. In the upper-right corner of the bill, above the left of ...