North Korea broadcasted indecipherable five-digit number segments during a radio segment on Friday, a Cold War-era espionage method intended to relay information to agents in the field, says a North Korea intelligence source, according Korean Joongang Daily.
The source exclusively told the JoongAng Ilbo that the North's propaganda radio station Pyongyang Radio Station aired a 12-minute segment in which a female announcer read five-digit numbers for 12 minutes, the first such broadcast in 16 years.
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