RFID random number generator created by NSF researchers
Filed in archive Ubiquitous Computing by gautam on September 13, 2007

These researchers have invented a technique where a set of random numbers can be created from the tag itself by reading the binary state of the memory cells of the tag. An EPC Class 1 tag generally has 1,000 to 4,000 gates and this memory in general is unstable therefore all information gets lost when memory loses power. Most of these tags either contain a charge or don't contain a charge when it's powered again which could be 0 or 1 but whenever some tag is powered it leads to fluctuation between gates having a charge and not having a charge and its these variations which can be utilized for generating a steady stream of random numbers. Also these variations can be used for uniquely identifying or creating fingerprints. Seems the researchers have made the task of generating random numbers for RFID companies a child's play.
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RFID tags RFID random number RFID rfid rfid+random
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