Posts tagged

Cryptography

Oct 16, 2026 HB

Getting the Keys: Reverse Engineering UDS Seed-Key Algorithms from Firmware

Delidded microcontroller on a dark workbench, amber light on the die and bond wires (AI-generated illustration)

Introduction

In the first article of this series we got a Linux box speaking raw CAN. In the second we climbed the stack to UDS and ended at the gate itself: security access, service 0x27, the seed-key handshake that guards everything interesting in an ECU - memory reads, firmw…

Reverse-Engineering Automotive CAN-Bus Linux Firmware UDS Cryptography

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