Category:TSEC/KY-3 secure telephone system
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secure telephone system developed by the U.S. National Security Agency in the early 1960s | |||||
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Media in category "TSEC/KY-3 secure telephone system"
The following 2 files are in this category, out of 2 total.
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Ky-3.jpg 395 × 768; 63 KB
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Nsa-museum-crypto-phone-dsc02731 (11674196946).jpg 3,076 × 4,614; 8.86 MB