On Tue, 11 Jan 2000 09:11:04 -0500, Roger Turk wrote:
> ALPHA ROMEO ALPHA CHARLIE HOTEL ... (etc.)
> This is the PUBLIC KEY. Everyone who received the message received the
> Public Key. The people to whom the message was intended would pull out their
Why should the transmitting station broadcast the PUBLIC KEY? The reference
numbers for each specific set of instructions for the ciphering gear setup
for any given date/time group should have been previously provided to all
operators during the pre-mission briefing. In case a code book and a
ciphering machine were compromised, the enemy would be able to exploit
such captured material to his maximum advantage simply by setting it up in
accordance with all the hints freely provided in the PUBLIC KEY that is being
broadcast in the clear.
Sam Heywood
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