Radio des nombres
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Slidex was a manual encoding system used to provide a short term level of security when non-secure communication links were being used. Gary Jones provides some background information on the device. "This was introduced into the British Army circa 1943/44, and by virtue of radio monitoring was broken by the German Intelligence fairly rapidly.
Slidex
Radio Station UVB 76
5473.0 (day); 3828.0 (night) – Leningradsky military district, Saint Petersburg: callsign “Riabina”, channel marker “squeaky wheel”, voice messagesThe Conet Project - Recordings of Shortwave Numbers Stations [ir
For more than 30 years the Shortwave radio spectrum has been used by the worlds intelligence agencies to transmit secret messages. These messages are transmitted by hundreds of Numbers Stations. Shortwave Numbers Stations are a perfect method of anonymous, one way communication. Spies located anywhere in the world can be communicated to by their masters via small, locally available, and unmodified Shortwave receivers. The encryption system used by Numbers Stations, known as a one time pad is unbreakable.
Note: The information presented in this section is for entertainment purposes only and does not disclose any information not already in the public domain. No assassination attempts are required! Thank you. Confirmation of the spy radio transmission "OLX" from the Czech Interior Ministry in 1994. Welcome to the Shortwave Espionage section. Here you can access the book "Secret Signals, The Euronumbers Mystery" which was written in 1991.
Number Stations
A numbers station (or number station ) is a type of shortwave radio station characterized by their unusual broadcasts, which consist of artificially generated voices reading streams of numbers, words, letters, tunes or Morse code . They are transmitted in a wide variety of languages and the voices are usually female, although sometimes men's or children's voices are used. In the 1950s, Time magazine reported that the numbers stations first appeared shortly after World War II and were using a format that had been used to send weather data during that war.