An anonymous reader writes "A new device devised by Amsterdam graduate student Melanie Rieback is designed to serve as a portable firewall for RFID tags. The portable battery-powered RFID Guardian uses an access control list to filter RFID queries, blocking queries that aren't approved. Rieback, who is also known for being the first researcher to develop a proof of concept RFID virus, hopes to offer version 3.0 of the RFID Guardian to the public at cost."
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