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Communication Dans Un Congrès Année : 2022

Variable-Length Instruction Set: Feature or Bug?

Résumé

With the increasing complexity of digital applications, the use of variable-length instruction sets became essential, in order to achieve higher code density and thus better performance. However, security aspects must always be considered, in particular with the significant improvement of attack techniques and equipment. Fault injection, in particular, is among the most interesting and promising attack techniques thanks to the recent advancements. In this article, we provide proper characterization, at the instruction set architecture (ISA) level, for several faulty behaviors that can be obtained when targeting a variable-length instruction set. We take into account the binary encoding of instructions, and show how the obtained behaviors depend on the alignment of the instructions in the memory. Moreover, we are also able to give a better insight on previous results from the literature, that were still partially unexplained. We also show how the observed behaviors can be e
 xploited in various security contexts.

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Dates et versions

hal-03775870 , version 1 (13-09-2022)

Licence

Paternité - Pas d'utilisation commerciale

Identifiants

  • HAL Id : hal-03775870 , version 1

Citer

Ihab Alshaer, Brice Colombier, Christophe Deleuze, Vincent Beroulle, Paolo Maistri. Variable-Length Instruction Set: Feature or Bug?. 25th Euromicro Conference on Digital System Design (DSD 2022), Aug 2022, Maspalomas, Spain. ⟨hal-03775870⟩
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