How Soviets used IBM Selectric keyloggers to spy on US diplomats

A National Security Agency memo that recently resurfaced a few years after it was first published contains a detailed analysis of what very possibly was the world's first keylogger—a 1970s bug that Soviet spies implanted in US diplomats' IBM Selectric typewriters to monitor classified letters and memos. The electromechanical implants were nothing short of an engineering marvel. The highly miniaturized series of circuits were stuffed into a...
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