Counter-espionage With Concrete

Scientists at the National Research Council of Canada have developed concrete capable of conducting electricity.
March 22, 2002, 7am PST | Abhijeet Chavan | @legalaidtech
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"A new concrete that can conduct electricity may make it possible to construct buildings in which the basic structure does double duty as an electromagnetic shield... Several Canadian and United States government agencies, including the United States Army Corps of Engineers, have approached the research council about using conductive concrete to trap computer signals."

Thanks to Abhijeet Chavan

Full Story:
Published on Thursday, March 21, 2002 in The New York Times
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