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EP0231702A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Method and apparatus for certifying services obtained by the use of a portable medium such as a memory-card

Assignee: Bull CP8 SA
•
Filing: 1986-12-22
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Granted: —
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Expires: 2006-12-22
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Abstract

Abstract Translated from French Un support portatif (2), connecté à un appareil (1), calcule un cer­tificat (C) composé d'un résultat (R) et des paramètres (PI, PE) nécessaires à son calcul. Ce résultat est calculé par les circuits de traitement (T2) de la carte (2) sous la commande d'un programme (P2) enregistré dans sa mémoire (M2) et d'une clé secrète (S). Ce résultat émis après la délivrance d'un service peut être recalculé ensuite pour certifier cette délivrance. A portable support (2), connected to a device (1), calculates a certificate (C) composed of a result (R) and the parameters (PI, PE) necessary for its calculation. This result is calculated by the processing circuits (T2) of the card (2) under the control of a program (P2) stored in its memory (M2) and a secret key (S). This result issued after the delivery of a service can then be recalculated to certify this delivery.

Inventors

  • 👤 François Chemin
  • 👤 Michel Ugon

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-25 22:06
CPC Classifications
G; G07; G07F; G07F7/00; G07F7/08; G07F7/10; G07F7/1008; G06; G06Q; G06Q20/00; G06Q20/30; G06Q20/34; G06Q20/341; G06Q20/38; G06Q20/40; G06Q20/409; G06Q20/4093; G06Q20/4097; G06Q20/40975; G07F7/0806; G07F7/0813; G07F7/082

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

EP0006498A1 Cited
EP0032193A1 Cited
FR2526977A1 Cited
EP0100260A1 Cited
EP0161181A1 Cited

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