Salon is running a cool article about numbers stations - shortwave radio stations that broadcast encrypted messages to spies worldwide. I hadn't known about this, though it makes sense if you think about it - the U.S. government uses a similar scheme to communicate with nuclear subs at sea. The article includes links to a site which has .mp3 recordings of some of the transmissions. Spooky. They've even transcribed some messages for a possible crack attempt, though if the men in black are truly using one-time pads this seems (ahem) unlikely to succeed.
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