Securing a smart card

H - Electricity – 04 – L

Patent

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Details

H04L 9/06 (2006.01)

Patent

CA 2713663

The invention provides a method for securing a smart card (100), the smart card comprising processing means (101), a memory (110) for storing in an encrypted fashion a software module (115) to be executed by the processing means, and a decryption means (130) configured for just-in-time decryption of the software module, the method comprising the step of providing the smart card with a white-box implementation of the decryption means. In one embodiment the white-box implementation comprises a white-box implementation of the Lombok cryptographic algorithm.

L'invention concerne un procédé de sécurisation d'une carte à puce (100), la carte à puce comprenant des moyens de traitement (101), une mémoire (110) destinée à stocker de manière cryptée un module logiciel (115) devant être exécuté par les moyens de traitement, et des moyens de décryptage (130) conçus pour le décryptage = juste à temps = du module logiciel, le procédé comprenant l'étape consistant à doter la carte à puce d'une implémentation de boîte blanche des moyens de décryptage. Dans un mode de réalisation, l'implémentation de boîte blanche comprend une implémentation de boîte blanche de l'algorithme de chiffrement de Lombok.

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