LIRA-V: Lightweight Remote Attestation for Constrained RISC-V Devices
It addresses security for cyber-physical systems and IoT devices using constrained RISC-V hardware, presenting the first remote attestation mechanism for this specific domain.
This paper tackles the problem of remote attestation for constrained RISC-V devices by proposing LIRA-V, a lightweight system that uses read-only memory and RISC-V PMP to build a trust anchor, achieving performance results demonstrating its suitability for such devices.
This paper presents LIRA-V, a lightweight system for performing remote attestation between constrained devices using the RISC-V architecture. We propose using read-only memory and the RISC-V Physical Memory Protection (PMP) primitive to build a trust anchor for remote attestation and secure channel creation. Moreover, we show how LIRA-V can be used for trusted communication between two devices using mutual attestation. We present the design, implementation and evaluation of LIRA-V using an off-the-shelf RISC-V microcontroller and present performance results to demonstrate its suitability. To our knowledge, we present the first remote attestation mechanism suitable for constrained RISC-V devices, with applications to cyber-physical systems and Internet of Things (IoT) devices.