Patent ID: 8941470
Filing Date: 2015-01-27
Classification: G06F,G06K,H04L

Abstract:
1. A method, comprising: providing a radio frequency identification (RFID) tag comprising a memory, the memory comprising a plurality of one time programmable (OTP) non-volatile memory locations configured to emulate at least one multiple time programmable (MTP) memory location for storing data, wherein the plurality of OTP non-volatile memory locations resist effects of environmental changes to the RFID tag, enabling the emulated at least one MTP memory location to emulate a hardened memory; receiving, at the RFID tag, an interrogation signal from an RFID interrogator comprising a command to store data to the RFID tag, wherein the RFID tag stores the data to a first OTP non-volatile memory location and a second OTP non-volatile memory location where the data stored to the second OTP non-volatile memory location is redundant with the data stored to the first OTP non-volatile memory location; receiving, at the RFID tag, an interrogation signal from the RFID interrogator comprising a command to read the data from the RFID tag; running a memory test to determine if the first OTP non-volatile memory location has been damaged; and reading and transmitting the data from the second OTP non-volatile memory location if the first OTP non-volatile memory location is damaged.