Do you plan to travel anytime soon by plane? If that's the case, then you will almost certainly have to pass trough the airport body scan before you can continue your travel... In fact, do you know how it all works and would you like to know more about the secrets behind it? Read the article below from msnbc.com and discover more:
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By Jeremy Hsu
New airport security scanners could become a popular alternative to body searches, but have also prompted some privacy concerns.
Whole-body imaging technologies can see through clothing to reveal metallic and non-metallic objects, including weapons or plastic explosives. They also reveal a person's silhouette and the outlines of underwear.
That hasn't stopped security officials from implementing them. The U.S. Transportation Security Agency (TSA) started using whole-body imaging at six airports this year, and plans are in the works to expand it to airports in several more U.S. cities later this year.
The TSA has tested two technologies, including "millimeter wave" (MMW) technology which bounces radio-frequency waves off people to construct a 3-D image within a few seconds. TSA also temporarily leased four "backscatter" units which use X-ray scanning, although the MMW method is currently faster.
Early this year, TSA began implementing MMW as a primary screening technology next to metal detectors at airports in San Francisco, Miami, Albuquerque, Tulsa, Salt Lake City and Las Vegas.
Airports in 20 U.S. cities, such as JFK in New York City and LAX in Los Angeles, have used or plan to use MMW tech this year. Other countries have also begun using or evaluating MMW for airport screening, including the UK, Netherlands, Japan and Thailand.
The MMW and backscatter scans intentionally blur facial features, and the security officer viewing images sits in a remote location where he or she cannot identify the passengers, said Lara Uselding, a TSA spokesperson. She added that the systems also delete scanned images after the viewings, and have "zero storage capability."
That has not stopped privacy advocates from asking how much passengers may unwittingly reveal in whole-body imaging.
"Body scanners produce graphic images of travelers' bodies and are an assault on their essential dignity," said Barry Steinhardt, director of the ACLU's Technology and Liberty Project. "The safeguards announced by the TSA do not convince us that the technology is acceptable, and we question the supposed voluntary nature of these scanners."
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