"Jim Vincent" wrote in message ...
I've hunted around but can't find the thread. Pointer appreciated. TIA..

Jim Vincent
CFIG
N483SZ
illspam

What exactly are you asking? IGC files created from gps-nav data inherently
do not and cannot have verifiable security. There's no fix for that other than
getting a newer logger. See "G record and Cambridge loggers" in this very
usenet group.