The Ledger Donjon security team used a focused laser to disable debug protections on the RP2350 microcontroller by flipping bits in a target register, demonstrating that physical access to hardware enables sophisticated attacks even against secure chips with glitch detection and secure boot features.
Ledger Donjon's security team used a focused laser to flip bits in the RP2350's debug-enable register, bypassing the chip's secure boot and glitch detection by decapsulating it and targeting the die with infrared light, demonstrating that physical access to hardware enables sophisticated attacks even against well-designed security features.