Security News > 2015 > October > Identifying CIA Officers in the Field (Schneier on Security)
2015-10-01 12:00
During the Cold War, the KGB was very adept at identifying undercover CIA officers in foreign countries through what was basically big data analysis. (Yes, this is a needlessly dense and very hard-to-read article. I think it's worth slogging through, though.)...
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https://www.schneier.com/blog/archives/2015/10/identifying_cia.html