Contact-less tag with signature, and applications thereof

G - Physics – 06 – F

Patent

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Details

G06F 21/24 (2006.01) G06Q 10/08 (2012.01) G06K 7/10 (2006.01) G06K 19/07 (2006.01) H04L 9/32 (2006.01) G01V 3/12 (2006.01) G01V 15/00 (2006.01) G06F 7/58 (2006.01)

Patent

CA 2645990

A method which comprises generating a first signature by encoding an identifier with a first additional data set at a first time instant; responding to a first read request from a tag reader by releasing the first signature; generating a second signature by encoding the identifier with a second additional data set at a second time instant, the second additional data set being different from the first additional data set; and responding to a second read request by releasing the second signature. Also, a method which comprises obtaining a signature from a contactlessly readable tag; decrypting the signature with a key to obtain a candidate identifier and a scrambling code associated with the signature; and validating the candidate identifier based on at least one of the scrambling code and the signature.

L'invention concerne un procédé comprenant la génération d'une première signature par le codage d'un identifiant avec un premier ensemble de données additionnelles à un premier instant ; la réponse à une première demande de lecture d'un lecteur d'étiquette par la publication de la première signature ; la génération d'une seconde signature par le codage de l'identifiant avec un second ensemble de données additionnelles à un second instant, le second ensemble de données additionnelles étant différent du premier ensemble de données additionnelles ; et la réponse à une seconde demande de lecture par la publication de la seconde signature. L'invention concerne également un procédé qui comprend l'obtention d'une signature à partir d'une étiquette lisible sans contact ; le décryptage de la signature avec une clé pour obtenir un identifiant candidat et un code de brouillage associé à la signature ; et la validation de l'identifiant candidat basée sur au moins l'un parmi le code de brouillage et la signature.

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