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wireless protocol security to the management, regulation, and sharing of collected RFID data. ? Our privacy work in the RFID Ecosystem has focused on controlling access to collected RFID data. Controlling Privacy ? As such, we acplish privacy control in the ecosystem chiefly through personal data auditing and by enforcing novel accesscontrol policies. Two tools let users directly interact with their personal RFID data and with the accesscontrol framework that governs data disclosure. Both can operate in conjunction with our physical access control (PAC) policy RFIDBased Web Applications ? A Search Engine for Things – We implemented a Web interface that lets users view the last recorded location for their tagged objects or search for a particular object’s location. ? Social Applications – Some of the most popular Web services offer information and updates on activities in our social works