Method for secure storage of sensitive data in a memory of...

Details Method for secure storage of sensitive data in a memory of... Method for secure storage of sensitive data in a memory of...

2007-08-21

2007-08-21

Moazzami, Nasser (Department: 2136)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

C713S193000, C713S194000, C726S026000

Reexamination Certificate

active

10049022

ABSTRACT:
The invention concerns a method for secure storage of a piece of so-called sensitive data, for example an encryption key, in a memory (M) of an embedded microchip system, particularly a smart card (CP). The memory (M) comprises two physically distinct storage devices (1, 2), for example a permanent memory of the “ROM” type (1), and a second, re-programmable memory of the “EEPROM” type (2). The piece of sensitive data is divided into at least two parts (d, d′), in a given logical configuration, each of these parts being stored in one of the distinct storage devices (1, 2). An additional piece of verification data, a checksum or hash data, can also be stored in the first storage device (1), at the same time as the first sensitive data part (d).The invention also concerns an embedded microchip system, particularly a smart card (CP).

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