Security researchers have released proof-of-concept code that enables an attacker to read the passport number, date of birth, and passport expiration date from passports with RFID tags enabled. Researcher Adam Laurie, known for his proof of concept attacks on Bluetooth-enabled devices, reported the new code on the Bugtraq mailing list Friday afternoon. This is the latest in a series of security questions leveled against wide-scale adoption of RFID tags. News.com's Joris Evers has more on the privacy and security concerns of RFID-enabled passports. Earlier this week, researchers at the University of Massachusetts revealed flaws in RFID-enabled, or so-called contactless, credit cards.