The US passport is about to go electronic, with a tiny microchip embedded in its cover. The chip is the latest outpost in the battle to outwit tamperers. But it's also one that worries privacy advocates. The RFID (radio frequency identification) chip in each passport will contain the same personal data as now appear on the inside pages - name, date of birth, place of birth, issuing office - and a digitized version of the photo. But the 64K chip will be read remotely. And there's the rub. The scenario, privacy advocates say, could be as simple as you standing in line with your passport as someone walks by innocuously carrying a briefcase. Inside that case, a microchip reader could be skimming data from your passport to be used for identity theft. Or maybe authorities or terrorists want to see who's gathered in a crowd and surreptitiously survey your ID and track you. Why not choose a contact chip, where there would be no possibility of skimming, asks Barry Steinhardt, director of the ACLU's Technology and Liberty Project. There was another way to go, which was to put an electronic strip in the passport that would require contact." The State Department says it's just following international standards set by the International Civil Aviation Organization (ICAO), under the umbrella of the United Nations. The ICAO specified the RFID ... at the behest of the United States. All countries that are part of the US visa-waiver program must use the new passports by Oct. 26, 2005. Mr. Steinhardt ... says the US pushed through the standards against the reservations of the Europeans. "Bush says at the G8 meeting, 'We have to adhere to the global standard,' as though we had nothing to do with it," he says in exasperation.