Registers – Coded record sensors – Particular sensor structure
Reexamination Certificate
2006-11-07
2010-11-09
Lee, Michael G (Department: 2876)
Registers
Coded record sensors
Particular sensor structure
C235S487000, C235S492000, C235S493000, C713S168000, C340S572100
Reexamination Certificate
active
07828213
ABSTRACT:
In an RF label identification system comprising a label reader and a plurality of labels, a unique and secret identifier being associated with each label, a first random number is sent from a label to the reader. A second random number is then sent from the reader to the label. In the RF label, a value of the encrypted identifier is then obtained by generating third and fourth random numbers in accordance with a probabilistic rule, by transforming the first and second random numbers in accordance with a determined function and by combining the identifier with the first and second random numbers, with the first and second transformed numbers and with the third and fourth random numbers. The value of the encrypted identifier is sent to the reader. After N repetitions of the above process, the reader identifies the RF label as a function of the N values of the encrypted identifier received, of the determined function, of the N first and second random numbers and of the probabilistic rule.
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Bringer Julien
Chabanne Hervé
Dottax Emmanuelle
Kelly Rafferty
Lee Michael G
Miller Matthias & Hull
Morpho
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