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Processor Anchor to Increase the Robustness Against Fault Injection and Cyber Attacks

Abstract : One major advance in software security would be to use robust processors which could assist the code developer to thwart both cyber and physical attacks. This paper presents a hardware-based solution which increases the security by checking the integrity of executed code on any microcontroller. Unlike other Control Flow Integrity (CFI) protections, this solution does not require modifications of the CPU pipeline, but relies on monitoring the interface between the processor and its instruction cache. The integrity of the execution flow and the instruction sequences (called Basic Blocks) is checked by hardware with precomputed metadata. Another module is dedicated to speed up the access to these metadata. This paper shows the effectiveness of the solution as the impact is as much as 21% in average on the execution time at the price of using memory space to store metadata along with the code.
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Contributor : Jean-Luc Danger Connect in order to contact the contributor
Submitted on : Thursday, February 11, 2021 - 2:42:53 PM
Last modification on : Wednesday, March 16, 2022 - 3:44:14 AM



Jean-Luc Danger, Adrien Facon, Sylvain Guilley, Karine Heydemann, Ulrich Kühne, et al.. Processor Anchor to Increase the Robustness Against Fault Injection and Cyber Attacks. Constructive Side-Channel Analysis and Secure Design. COSADE 2020, Apr 2020, Lugano, Switzerland. pp.254-274, ⟨10.1007/978-3-030-68773-1_12⟩. ⟨hal-03138848⟩



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