Historical question: Longevity of Colossus.

[Paul Leyland]

> So far as I am aware, decryption of German signals (especially
> those using the Naval Emigma machine) continued for quite some
> time after the war.  Additionally (heresay), captured Enigma
> machines were refurbished and sold to other governments.

While the above is undoubtedly true, and probably explains in large measure
why knowledge that Enigma traffic had been comprehensively broken was
classified for almost thirty years, it doesn't really answer my question.

Colossus was not used to break Enigma.  It was used on the output of the
Lorenz machines.  These enciphered teletype traffic by exoring with a
keystream generated by a rotor machine far more complicated than even Naval
Enigma.


Paul