How even the dumbest Russian spies can outwit the NSA.
"But as incompetent as these spies were, they were bright enough to at least partially outwit the large-scale e-mail snooping efforts of the NSA's backbone taps and multibillion-dollar datacenters. How? By using steganography to encode secret text messages in image files, which they then placed on websites."
"The ultimate point here is one that I've made again and again: it's very, very hard for data mining techniques to extract truly reliable signals from even a relatively high-quality, carefully curated dataset. But when a tiny fraction of a giant dataset has been maliciously and stealthily manipulated by humans who, even at their most incompetent, are still smarter than computers, then the GIGO rule kicks in and you're getting garbage without knowing it."
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