Information processing unit having tamper-resistant system

Information security – Monitoring or scanning of software or data including attack... – Intrusion detection

Reexamination Certificate

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Details

C726S020000, C713S193000

Reexamination Certificate

active

07451485

ABSTRACT:
A malfunction detection system is provided that can continue or terminate processing appropriately even if a malfunction occurs in an information processing unit. In this regard, the information processing unit receives branch direction information, carries out a conditional branch depending on the branch direction information, and performs an applicable operation on data I. At this time, the information processing unit performs an applicable operation on data J, other than the operated data I, in the conditional branch path and outputs the result for examination, thereby enabling validation of the conditional branch.

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Anderson et al., “Tamper Resistance—A Cautionary Note”, 1996, USENIX Association, The Second USENIX Workshop on Electronic Commerce Proceedings, pp. 1-11.
Notification of Reasons for Refusal (Office Action) issued by Japan Patent Office dated Feb. 23, 2007 to corresponding Japanese patent application No. 2001-138073.
Notification of Reasons for Refusal (Office Action) issued by Japan Patent Office dated May 15, 2007 to corresponding Japanese patent application No. 2001-138073.

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