Havana continues to communicate with its spies aground the world using low-tech, but highly effective High Frequency (HF) radio broadcasts. Commonly known as “shortwave radio,” Cuban agents and their spymasters receive these broadcasts on a shortwave radio and then type the numeric groups onto a laptop computer using a special disk to decrypt the HF broadcast.
To listen to a agent broadcast intercepted by a shortwave radio operator earlier today, click here: http://www.youtube.com/watch?v=n67NBHpaDrQ
Editor’s Note: For more on Havana’s communications techniques, see these Cuba Confidential posts: “Cuban Agent Communications: [The] Failure of a Perfect System, “ July 3, 2012, https://cubaconfidential.wordpress.com/2012/07/03/cuban-agent-communications-the-failure-of-a-perfect-system/ and “Numbers Station Spies on 40 Meters,” July 1, 2012, https://cubaconfidential.wordpress.com/2012/07/01/1660/
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