Police will be able to see through walls with a WIFI router. Good or bad?
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Wi-Fi radio signals are found in 61 percent of homes in the U.S. and 25 percent worldwide, so Karl Woodbridge and Kevin Chetty, researchers at University College London, designed their detector to use these ubiquitous signals. When a radio wave reflects off a moving object, its frequency changes—a phenomenon called the Doppler effect.
Their radar prototype identifies frequency changes to detect moving objects. It’s about the size of a suitcase and contains a radio receiver composed of two antennas and a signal-processing unit. In tests, they have used it to determine a person’s location, speed and direction—even through a one-foot-thick brick wall. Because the device itself doesn’t emit any radio waves, it can’t be detected.
Wi-Fi radar could have domestic applications ranging from spotting intruders to unobtrusively monitoring children or the elderly. It could also have military uses: The U.K. Ministry of Defence has funded a study to determine whether it could be used to scan buildings during urban warfare.
Police will be able to see through walls with a WIFI router. Good or bad?
Read More: http://www.popsci.com/technology/article/2012-07/s...
Top Opinion
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Jerry (Iron Priest)☮ R ☮ P ... 2012/07/24 22:42:06Bad





















The Supreme Court announced the following rule: “when . . . the Government uses a device that is not in general public use, to explore details of the home that would previously have been unknowable without physical intrusion, the surveillance is a “search” and is presumptively unreasonable without a warrant.” Because infrared temperature sensing was not in “general public use,” the thermal imaging was a “search” that required a warrant. There are several ways to justify the “general public use” limitation on the result in Kyllo. Perhaps the idea was that if a technology is widely used by the public, it is not longer reasonable expect that it won’t be used. This reflects what I have called the probabilistic model of Fourth Amendment protection, and is hinted at in footnote 6 of Kyllo. Alternatively, perhaps the Court was trying to square the result in Kyllo with cases going back to the 1920s that that had allowed the police to use flashlights.
see Kyllo v. United States, 533 U.S. 27 (2001) also see
United States v. Lee, 274 U.S. 559, 563 (1927); United States v. Dunn, 480 U.S. 294 (1987)
Take care,
Think about living in a world where there is no where to hide from cameras, no where to go where you know you are not watched, and no secrets personal or otherwise from big brother. Is that a fair exchange for a piece of security from events most Americans are not likely to ever be victims of? And still, with losing all of our rights and personal security, our safety can not be guaranteed each time we walk into a building, or get on a plane. I rather live my life free, then caged by watchful eyes even in my own home.
If they can see drugs on your table through your window from the sidewalk, it is fair, though?