steganography
31Grille (cryptography) — In the history of cryptography, a grille cipher was a technique for encrypting a plaintext by writing it onto a sheet of paper through a pierced sheet (of paper or cardboard or similar). The earliest known description is due to the polymath… …
32Department of Defense Cyber Crime Center — Defense Cyber Crime Center Seal Agency overview Formed 1998 Headquarters Linthicum, Maryland Parent …
33Cipher — For other uses, see Cipher (disambiguation). Edward Larsson s rune cipher resembling that found on the Kensington Runestone. Also includes runically unrelated blackletter writing style and pigpen cipher. In cryptography, a cipher (or cypher) is… …
34Industrial espionage — Teapot with Actresses, Vezzi porcelain factory, Venice, ca. 1725. The Vezzi brothers were involved in a series of incidents of industrial espionage. It was these actions that led to the secret of manufacturing Meissen porcelain becoming widely… …
35One-time pad — Excerpt from a one time pad In cryptography, the one time pad (OTP) is a type of encryption, which has been proven to be impossible to crack if used correctly. Each bit or character from the plaintext is encrypted by a modular addition with a bit …
36Detection — In general, detection is the extraction of information from any clear or clouded ambient or otherwise accessible stream of information without neither support from the sender nor synchronization to the sender.In the history of radio… …
37Laser printer — HP LaserJet 4200 series printer, installed atop high capacity paper feeder …
38Surveillance — For other uses, see Surveillance (disambiguation). A nest of surveillance cameras at the Gillette Stadium in Foxborough, Massachusetts Surveillance ( …
39Telephone tapping — Wiretap redirects here. For the radio program, see WireTap (radio program). Telephone tapping (also wire tapping or wiretapping in American English) is the monitoring of telephone and Internet conversations by a third party, often by covert means …
40Numbers station — Fictional example of a numbers station. Numbers stations (or number stations) are shortwave radio stations of uncertain origin. In the 1950s, Time magazine reported that the numbers stations first appeared shortly after World War II and were… …
