Pedestrians and people at rail and bus stations and special events venues do not know that they are being scanned. Yes, at times without their knowledge, they are subjected to x-rays that may be harmful to health. This is another issue of privacy invasion yet it was not revealed that it does exist.
The Electronics Privacy Information Center (EPIC) has obtained documents that suggest a signing of contract to this effect. The U.S. Department of Homeland Security has tapped the services of providers to develop new mobile and static scanning systems. The contract signed was worth millions of dollars and was intended specifically for detection of explosives.
Through a request under the Freedom of Information Act filed last year, EPIC was able to obtain the documents from the DHS. The documents show that Siemens Corporate Research and Northeastern University was tasked on a special assignment. It is to design and develop an Intelligent Pedestrian Surveillance platform. Specifically, it would be one that could detect improvised explosive devices hidden in backpacks and under clothing.
This system uses X-rays, capable of quickly scanning through vehicles and buildings for concealed explosives and contraband. Several cameras are mounted on a so-called Z Backscatter Van that secretly scans moving pedestrians for possible threats. Basically, a Z Backscatter Van is a new type of mobile threat detection system.
The other contract covered a scanning system that would be used at entrances to special events or other points of interest. Rapiscan Systems was tasked to develop this walk-through X-ray screening system. This will be installed along corridors where people are scanned without their knowledge. This is capable of detecting hidden metallic and high-density plastic objects on people as far as 10 meters away.
EPIC said that the documents it contain parts that describe of a plans by DHS to use the scanners secretly. A critic said that DHS seems to believe that “it has that wide authority to implement its national security goals”. Of course that could be accepted, but the question of breach of privacy rights should also be given due consideration.