Thread: Flashing Nokia N95 or any other mobile with Maemo
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jethro.itt
2009-09-21 , 16:01
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#11
Originally Posted by ruskie View Post
What keys? Please enlighten us on that. Also a bootloader is not necessary if you can reverse engineer what it needs to boot then provide the same hooks in.
The SoCs (System-on-Chip) that Nokia and others use have a small piece of code and a set of keys in ROM to check the authenticity of the bootloader. The bootloader then checks the authenticity of the firmware image (e.g. Symbian OS), which in turn checks the authenticity of each piece of software to be installed.

The check in Symbian OS has been defeated, but the other two checks have not been, to my knowledge.