steganography
41Interrogation — For other meanings of this and similar words (words starting Interrog... ) see Interrogation (disambiguation). A police interrogation room in Switzerland. Interrogation (also called questioning or interpellation) is interviewing as commonly… …
42Microdot — For other uses, see Microdot (disambiguation). Mark IV microdot camera A microdot is text or an image substantially reduced in size onto a 1mm disc to prevent detection by unintended recipients. Microdots are normally circular around one… …
43Canary trap — A canary trap is a method for exposing an information leak, which involves giving different versions of a sensitive document to each of several suspects and seeing which version gets leaked.The term was coined by Tom Clancy in his novel Patriot… …
44History of cryptography — The history of cryptography begins thousands of years ago. Until recent decades, it has been the story of what might be called classic cryptography that is, of methods of encryption that use pen and paper, or perhaps simple mechanical aids. In… …
45Dinosaur Comics — Author(s) Ryan North Website qwantz.com Current status / schedule …
46Dead drop — spike A dead drop or dead letter box is a method of espionage tradecraft used to pass items between two individuals by using a secret location and thus does not require them to meet directly. Using a dead drop permits a Case Officer and his Agent …
47Concealment device — Concealment devices or diversion safes are used to hide things for the purpose of secrecy or security. They are made from an ordinary household object such as a book, a soda can, a candle, a can, or something as small as a coin. The idea is that… …
48Direction finding — (DF) refers to the establishment of the direction from which a received signal was transmitted. This can refer to radio or other forms of wireless communication. By combining the direction information from two or more suitably spaced receivers… …
49One-way voice link — A one way voice link (OWVL) is a shortwave radio communication method used by spy networks to communicate with agents in the field. This system often employs recorders to transmit pre recorded messages in real time or in burst transmissions,… …
50Jessica Fridrich — This article is about the person Jessica Fridrich. For the speedsolving method of a rubik s cube, see Fridrich Method. Jessica Fridrich is the inventor of the most commonly used method for speed solving the Rubik s Cube, better known as… …
