Software

Evaluation of Countermeasures Against Fault Attacks on Smart Cards

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Executive Summary

Java Card are devices subject to either hardware and software attacks. Thus, several countermeasures need to be embedded to avoid the effects of these attacks. Recently, the idea to combine logical attacks with a physical attack to bypass byte code verification has emerged. For instance, correct and legitimate Java Card applications can be dynamically modified on-card using laser beam. Such applications become mutant applications, with a different behavior. This internal change could lead to bypass control and protection and thus should offer illegal access to secret data and operation inside the chip.

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