The Use of the B Formal Method for the Design and the Validation of the Transaction Mechanism for Smart Card Applications

Authors:
Denis Sabatier;Pierre Lartigue
Affiliations:
Steria Méditerranée—Equipe AtelierB 530, rue F.Joliot 13791 Aix-en-Provence, France. denis.sabatier@steria.fr;Gemplus Research Lab—Av Pic de Bertagne 13881 Gemenos, France. pierre.lartigue@gemplus.com
Venue:
Formal Methods in System Design
Year:
2000

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Abstract

This document describes an industrial application of the B method in smart card applications. In smart card memory, data modification may be interrupted due to a card withdrawal or a power loss. The EEPROM memory may result in an unstable state and the values subsequently read may be erroneous. The transaction mechanism provides a secure means for modifying data located in the EEPROM. As the security in smart card applications is paramount, the use of the B formal method brings high confidence and provides mathematical proof that the design of the transaction mechanism fulfills the security requirements.