RFID in library - security, technology architecture and privacy

David Molnar and David Wagner of Bekerley have appraised the security aspects, as well as the relationship with privacy via this article: http://www.cs.berkeley.edu/~dmolnar/library.pdf. It's a very technical literature which contributes to RFID usage in libraries. Perhaps, it will take some of my time to extract it. Both writers have attempted to mention that they could not answer to this question: "Is the cost of privacy and security worth it?" and again, I am attracted with their views: that libraries should make an informed decision as well as technical option to further improve RFID systems. A good article.