System for preventing tampering with a signal conditioner...

Details System for preventing tampering with a signal conditioner... System for preventing tampering with a signal conditioner...

G - Physics

01

F

G01F 1/84 (2006.01) G01D 3/08 (2006.01) G01D 4/00 (2006.01) G06F 21/00 (2006.01)

Patent

CA 2395643

A system for prevention of tampering with signal conditioning circuitry (110) in meter electronics (20). In accordance with this invention a host system (100) remote from the signal conditioner (110) periodically (301) transmits a request for authentication information to the signal conditioner. The signal conditioning circuitry (110) (401) receives the request and (402) transmits authentication information back to the host system (100). The host system (100) receives the authentication information from the signal conditioning circuitry (110) and stores the authentication information in memory to provide an audit trail. Image

L'invention concerne un système destiné à éviter toute tentative d'accès non autorisée aux circuits (110) de traitement du signal dans les dispositifs électroniques de mesure (20). Selon la présente invention, un système hôte (100) éloigné du dispositif (110) de traitement du signal adresse périodiquement (301) une demande d'informations d'authentification au dispositif de traitement du signal. Les circuits (110) (401) de traitement du signal reçoivent cette demande et (402) envoient en retour les informations d'authentification au système hôte (100). Le système hôte (100) reçoit les informations d'authentification des circuits (110) de traitement du signal et garde lesdites informations en mémoire pour fournir une piste de vérification.

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