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EP0409701A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Hard-wired micro-circuit card and transaction method between a respective hard-wired micro-circuit card and a terminal

Assignee: Orange SA
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Filing: 1990-07-12
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Granted: —
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Expires: 2010-07-12
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Abstract

Abstract Translated from French L'invention concerne une carte à microcircuit du type comprenant : - une interface de communication; - une mémoire interne; - une unité de traitement câblée permettant d'adresser de l'extérieur cette mémoire interne. Selon la principale caractéristique de l'invention, il est prévu une zone mémoire interne secrète (40), non adressable de l'extérieur, et l'unité de traitement comprend un circuit câble (30) propre à utiliser le contenu de la mémoire secrète pour établir une première fonction cryptographique (f) série de deux opérandes, et des moyens réagissant à l'interrogation d'adresses prédéterminées de la mémoire interne, accompagnée d'un mot clé (19), en appliquant ce mot clé (19) et la sortie (20) de la mémoire interne comme opérandes du circuit câblé (30), tandis que la sortie (39) du circuit câblé est appliquée à l'interface. The invention relates to a microcircuit card of the type comprising: - a communication interface; - an internal memory; - a wired processing unit enabling this internal memory to be addressed from the outside. According to the main characteristic of the invention, a secret internal memory zone (40) is provided, which cannot be addressed from the outside, and the processing unit comprises a cable circuit (30) suitable for using the content of the secret memory. to establish a first cryptographic function (f) series of two operands, and means reacting to the interrogation of predetermined addresses from the internal memory, accompanied by a keyword (19), by applying this keyword (19) and the output (20) of the internal memory as operands of the wired circuit (30), while the output (39) of the wired circuit is applied to the interface.

Inventors

  • 👤 Jean-Claude Pailles
  • 👤 Marc Girault

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 07:45
CPC Classifications
G; G07; G07F; G07F7/00; G07F7/08; G07F7/10; G07F7/1008; G06; G06Q; G06Q20/00; G06Q20/30; G06Q20/34; G06Q20/341; G06Q20/357; G06Q20/36; G06Q20/367; G06Q20/3672; G06Q20/3676; G06Q20/38; G06Q20/40; G06Q20/409; G06Q20/4097; G06Q20/40975; G07F7/0806; G07F7/0813; G07F7/082; G07F7/0866

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

EP0037762A1 Cited
EP0193920A2 Cited
EP0241379A1 Cited
EP0250309A1 Cited
FR2606909A1 Cited
EP0252849A1 Cited

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