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Introducing Raspberry Pi Pico 2
(www.raspberrypi.com)
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this post was submitted on 08 Aug 2024
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That's usually not how secure boot is configured on microcontrollers. They usually come with no code installed and an unsigned bootloader, and therefore no barrier for you to flash what you want on it.
In fact, the STM32 has secure boot, and it's still one of the most popular microcontrollers for makers and hackers. That's because the secure boot feature is there for developers, hackers and makers to use if they want to.
True, but if you buy a finished product that uses the new chip that has secure boot enabled, you can't flash your own firmware. From what I gather, the boot keys are burned into OTP memory so they can't be erased or changed. The chip is permanently locked to that firmware.
That's correct.
Which is good, as otherwise it would defeat the purpose of secure boot.
I wish these implementations of secure boot were designed more to protect the SOFTWARE against "theft" than the HARDWARE against "tampering". Let us wipe the secure boot keys, but in the process erase the firmware (or have the firmware encrypted so that erasing the keys renders it unbootable) and then allow new code to run. Blocking third party firmware on consumer devices is a shit move. It just creates more e-waste when the OEM stops updating it and the community can't make their own replacement firmware.