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

According to the method encryption data is stored in two physically separate memory elements (1, 2), e.g. a ROM (1) and a re-programmable EEPROM (2). The encryption data is split into two parts (d, d') according to a specific logic configuration with each part stored in a separate memory element. Supplementary data such as sum or hash data may also be recorded in the first storage element at the same time as the first sensitive data part. An Independent claim is made for an electronic memory chip for recording sensitive data that has two memory areas for storage of two parts of the sensitive data.