Glitch Detection and Clock Monitoring: Hardening Automotive Microcontrollers Against Side-Channel Attacks

Abstract: Protecting vehicle electronic control units from physical fault injection attacks (voltage glitching, clock glitching, laser manipulation).

1. Physical Attack Vectors in Automotive Electronics Automotive ECUs can fall into the hands of adversaries seeking to defeat engine immobilizers, tamper with odometers, or bypass intellectual property protections. Attackers deploy high-speed pulse generators to drop V_core voltage for 5 nanoseconds, inducing instruction skipping during cryptographic checks.

2. On-Chip Hardware Defenses Advanced automotive microcontrollers integrate internal analog glitch detectors, redundant dual-rail logic, and randomized internal clock jitter. When an environmental anomaly is detected, the chip initiates an instantaneous register zeroization, wiping transient cryptographic keys before attackers can exploit the glitch.