SECRET INFORMATION PROCESSING SYSTEM AND LSI

摘要

[Challenge] In a system which processes secret information, use of a secret information processing LSI due to unauthorized tampering of software, spoofing or the like is prevented and data on a bus are protected against analysis using a probe, etc. [Solution] Within the secret information processing LSI, software which controls an LSI 1002 is subjected to tampering detection within a comparator 1008 and authentication processing within a comparator 1020, thereby confirming the validity of the software and preventing use of the secret information processing LSI by unauthorized software. The LSI and the software share session keys 1035 and 1038 which are based on a random number used for authentication processing and encrypted communications are attained using the session keys, which protects data on a bus.