encrypted signal
51Very low frequency — or VLF refers to radio frequencies (RF) in the range of 3 kHz to 30 kHz. Since there is not much bandwidth in this band of the radio spectrum, only the very simplest signals are used, such as for radio navigation. Also known as the myriameter… …
52Television — For other uses, see Television (disambiguation). TV redirects here. For other uses, see TV (disambiguation) …
53Wake-on-LAN — (WOL) is an Ethernet computer networking standard that allows a computer to be turned on or woken up by a network message. The message is usually sent by a program executed on another computer on the same local area network. It is also possible… …
54Huff-Duff — High frequency direction finder is usually known by its acronym HF/DF, pronounced Huff Duff. This has become the common name for this type of radio direction finder, and was coined during World War II.The idea of using two or more radio receivers …
55Features removed from Windows Vista — While Windows Vista contains many new features, a number of capabilities and certain programs that were a part of Windows XP are no longer present or changed, resulting in the removal of certain functionality. The following is a list of features… …
56Wireless intercom — A wireless intercom is an electronic device that enables voice communication without the need to run wires between intercom stations. A wired intercom system may incorporate wireless elements.There are many types of wireless intercom systems on… …
57Bluetooth — This article is about the electronic protocol. For the medieval King of Denmark, see Harald I of Denmark. Bluetooth logo Bluetooth is a proprietary open wireless technology standard for exchanging data over short distances (using short wavelength …
58ISDB — Integrated Services Digital Broadcasting (ISDB) is a Japanese standard for digital television (DTV) and digital radio used by the country s radio and television stations. ISDB replaced the previously used MUSE Hi vision analogue HDTV… …
59Crypto phone — Crypto phones are mobile telephones that provide security against eavesdropping and electronic surveillance. The interception of telecommunications has become a major industry. Most of the world s intelligence agencies and many private… …
60Clandestine HUMINT operational techniques — The Clandestine HUMINT page deals with the functions of that discipline, including espionage and active counterintelligence. This page deals with Clandestine HUMINT operational techniques, also called tradecraft . It applies to clandestine… …
