Marc wrote:
All flight recorders currently approved for "all flights" or "all
badges and diplomas" have unique public/private key pairs for each
unit.

Thanks Marc, I must have missed that part of the spec when I last read
it. Interesting, I wonder how the public keys are distributed to the
VALI.exe files.

Whenever I see such "security by obscurity", I fear the worst.
Usually, this assumption is close to the truth.

I, as a member of the IGC GNSS Flight Recorder Approval Committee,
would like to see the algorithms standardized and the public keys
openly distributed, but life is always a bit more complicated than
it might seem...

Too sad, that's a big chance that was missed. It's extremely
cumbersome or impossible to validate an IGC file on a machine other
than Windows-i386.

Max