Stopping Competitors Cloning Your Hardware: Secure Boot and Firmware Protection
Firmware that can be read out can be copied. How I protect products with secure boot, encryption and locked debug ports.
The problem clients bring: "We found cheap copies of our product online running our firmware." Or, before launch: "How do we make sure that never happens?"
What is really going wrong
- Debug ports are left open, so anyone can read the flash.
- Firmware is stored unencrypted and runs without being verified.
- Update files are not signed, so modified firmware can be installed.
- Secrets such as cloud keys are compiled into every unit.
How I solve it
- Enable secure boot so the device only runs firmware signed by the client.
- Encrypt flash so a read-out reveals nothing useful.
- Sign every update and verify it before installing.
- Give each unit its own credentials instead of shared secrets.
- Lock debug interfaces in production, with a documented process for authorised servicing.
What the client gets
A product that is much harder to copy or tamper with, set up so that manufacturing and field updates still work smoothly.