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Re: S/Key implementation question
You youngsters have no sense of history. Don't they teach you anything in
Many, many years ago, the top bit was used as a parity check on the other
seven. You'll find vestiges of this in the tty driver today. In those days
many programs stripped the top bit. The default character set was ascii,
and obsolete seven bit code, so no information was lost.
About 15 years ago ISO 8859 replaced ascii for most things and there was a
campaign to make the whole system "eight bit clean."
If the s/key spec says the seed and pass phrase must be ascii, then this
routine does no harm but is probably not useful. If the pass phrase is
allowed to contain non-ascii, this routine should probably be removed.