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This paper presents LIRA-V, a lightweight system for performing remoteattestation between constrained devices using the RISC-V architecture. Wepropose using read-only memory and the RISC-V Physical Memory Protection (PMP)primitive to build a trust anchor for remote attestation and secure channelcreation. Moreover, we show how LIRA-V can be used for trusted communicationbetween two devices using mutual attestation. We present the design,implementation and evaluation of LIRA-V using an off-the-shelf RISC-Vmicrocontroller and present performance results to demonstrate its suitability.To our knowledge, we present the first remote attestation mechanism suitablefor constrained RISC-V devices, with applications to cyber-physical systems andInternet of Things (IoT) devices.

LIRA-V: Lightweight Remote Attestation for Constrained RISC-V Devices