Securing a printhead in a closed system metering device

Details Securing a printhead in a closed system metering device Securing a printhead in a closed system metering device

H - Electricity

04

L

H04L 9/18 (2006.01) G06F 7/58 (2006.01) G07B 17/02 (2006.01) H04K 1/00 (2006.01) H04L 9/00 (2006.01) H04L 9/06 (2006.01)

Patent

CA 2462850

A closed system meter that secures the link between the accounding device (32) and printer (34) utilizing a Linear Feedback Shift Register (LFSR) based stream encryption is provided. The accounting device (32) includes an LFSR that comprises a plurality of stages, with one or more taps that are passed through a logic gate to provide a "feedback" signal to the input of the LFSR, to generate a pseudo-random pattern output. Preferably, a Shrinking Key Generator (SKG) is utilized to further ensure privacy of the data. The output data from the accounting unit is encrypted utilizing the output from the LFSR and sent to the printing device (34). The printing device (34) includes a similar LFSR, which is utilized to decrypt the output data from the accounting unit (32) and enable printing.

L'invention concerne un compteur de système fermé qui sécurise la liaison entre le dispositif comptable (32) et l'imprimante (34), mettant en oeuvre le chiffrement de flux basé sur un registre à décalage de réaction linéaire (LFSR). Le dispositif comptable (32) contient un registre LFSR comprenant plusieurs étages, avec au moins une dérivation passée à travers un portail logique pour obtenir un signal de "réaction" à l'entrée du registre LFSR, afin de générer une sortie à schéma peudo-aléatoire. De préférence, un générateur de clé de rétrécissement (SKG) est utilisé pour assurer davantage le secret des données. Les données de sortie de l'unité comptable sont chiffrées à l'aide de la sortie du registre LFSR et envoyées au dispositif d'impression (34). Ce dispositif d'impression (34) comprend un registre LFSR similaire utilisé pour déchiffrer les données de sortie de l'unité comptable (32) et permettre l'impression.

Affiliated with

Also associated with

Rating

Securing a printhead in a closed system metering device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Securing a printhead in a closed system metering device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Securing a printhead in a closed system metering device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1403086