1. NORMS AND LAW This paper examines the privacy impacts of using radio frequency identification (RFID) to tag information goods such as books, music, and video. Individuals have strong expectations of privacy in their choice of information goods. These expectations are supported by both social norms and law. As a matter of practice, people may generally purchase and browse information goods without identifying themselves or the subject of their inquiry. People may pay in cash and avoid creating records that provide opportunities for third parties to learn of their information habits. Information providers that maintain records, such as libraries and bookstores, have staunchly defended their patrons’ privacy, and indeed are often bound legally to demand due process of law before disclosing those records. Data holders can examine subpoenas for authenticity and cause, and challenge them in court before disclosing private information. Bookstores have done so in recent high-profile cases. [6][9] Libraries have developed elaborate policy mechanisms to ensure records are kept private, [1] and lobbied for laws protecting library records.