I don't recall the original Unix [password-hasing
one-way function],
but it was based on some rotor crypt, possibly inspired by the engima
machine.
The "traditional" Unix password hash is DES-based (the trivialized
Enigma code is crypt(1), not crypt(3)). Was there an even older
version? Did it ever escape Bell Labs?
For that matter, was enough publicly known about the Enigma at the time
to do that then?
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