METHOD FOR SECURE STORAGE OF SENSITIVE DATA IN A SILICON CHIP INTEGRATED SYSTEM STORAGE, IN PARTICULAR A SMART CARD, AND INTEGRATED SYSTEM THEREFOR

摘要

The invention concerns a method for secure recording of so-called sensitive data, for instance an encryption key in a storage (M) of a silicon chip integrated system, in particular a smart card (CP). The storage (M) comprises two physically separate storage members (1, 2) for example a ROM (1) and a reprogrammable EEPROM (2). The sensitive data is split into at least two parts (d, d'), in accordance with a specific logic configuration, each of these parts being recorded in one of the separate storage members(1, 2). A supplementary information, controlling sum or hashing data, can be additionally recorded in the first storage member (1) simultaneously with the first part of sensitive data (d). The invention also concerns a silicon chip integrated system, in particular a smart card (CP).