After 'Godzilla Attack!' US warns about traffic sign hackers

BOSTON: After hackers played several high-profile pranks with traffic signs, including warning San Francisco drivers of a Godzilla attack, the US government advised operators of electronic highway signs to take "defensive measures" to tighten security. 

Last month, signs on San Francisco's Van Ness Ave were photographed flashing "Godzilla Attack! Turn Back" and highway signs across North Carolina were tampered with last week to read "Hack by Sun Hacker."