Re: [mkgmap-dev] Recent Garmin Firmware "cannot authenticate maps" when they are unicode

Hi Franco,

I do not see any reason why GARMIN should only require UNICODE maps to be signed, while LATIN1 maps can remain unsigned.

Signature is a protection for locked map. Garmin can't implement a protection, which would disable maps already sold, so the protection is triggered by a feature, which appears only in new maps.

I suspect that there is a flag in the file header, maybe a new and undocumented one, that marks the file as "check for signature".

Code page is the flag. Independent flag in header would damage the whole idea of protection, if you could simply turn it off. -- Best regards, Andrzej