Type of Publication: Article in Collected Edition
LO-FAT: Low-Overhead Control Flow ATtestation in Hardware
- Ghada Dessouky; Shaza Zeitouni; Thomas Nyman; Andrew Paverd; Lucas Davi; Patrick Koeberl; N. Asokan; Ahmad-Reza Sadeghi
- Title of Anthology:
- Proc. of 54th Design Automation Conference (DAC)
- Publication Date:
- Link to complete version:
Attacks targeting software on embedded systems are becoming increasingly prevalent. Remote attestation is a mechanism that allows establishing trust in embedded devices. However, existing attestation schemes are either static and cannot detect control-flow attacks, or require instrumentation of software incurring high performance overheads. To overcome these limitations, we present LO-FAT, the first practical hardware-based approach to control-flow attestation. By leveraging existing processor hardware features and commonly-used IP blocks, our approach enables efficient control-flow attestation without requiring software instrumentation. We show that our proof-of-concept implementation based on a RISC-V SoC incurs no processor stalls and requires reasonable area overhead.