New technology at the busiest border crossing in the U.S. can read chip-enabled travel documents up to 30 feet from an inspection booth, promising shorter waits but raising concerns about targeting by computer hackers. San Diego’s San Ysidro border crossing is a key test for the radio frequency identification readers, because the facility is used by about 150,000 people daily. It’s the 13th land crossing to get the technology in recent months, and U.S. Customs and Border Protection plans to have it in place by June at the 39 busiest crossings with Mexico and Canada.
