Technology that depends on satellite-navigation signals is increasingly
threatened by attack from widely available equipment, experts say.
While "jamming" sat-nav equipment with noise signals is on the rise, more
sophisticated methods allow hackers to program what receivers display.
At risk are not only sat-nav users, but also critical national infrastructure.
A UK meeting outlining the risks was held at the National Physical Laboratory
in Teddington on Tuesday.
"GPS gives us transportation, distribution industry, 'just-in-time'
manufacturing, emergency services operations - even mining, road building and
farming, all these and a zillion more," David Last, a consultant engineer and
former president of the Royal Institute of Navigation, told the conference.