Terahertz Millimeter-Wave Scanners
Schneier on Security
OCTOBER 3, 2018
The heart of the device is a block of electronics about the size of a 1990s tower personal computer. Most images that might be mistaken for a weapon -- backpacks or a big patch of sweat on the back of a person's shirt -- are easily evaluated by observing the terahertz image alongside an unaltered video picture of the passenger.
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