A proper law

[Brian Gladman]

----- Original Message ----- 
From: "David Hansen" <davidh@spidacom.co.uk>
To: <ukcrypto@chiark.greenend.org.uk>
Sent: Thursday, March 06, 2003 4:18 PM
Subject: Re: A proper law


> On 6 Mar 2003 at 16:10, Brian Gladman wrote:
> 
> > The most
> > spectaculer own goal was the reflection of the signal back through the
> > rotor system. This was a classic, since repeated many times, in which
> > a step that seems to improve security has exactly the opposite effect
> > (a sin I have commited myself more than once).
> 
> The one that still fascinates me is how the plugboard was made 
> essentially irrelevant, by the diagonal board IIRC (I must read up 
> again some time). Even Alan Turing was stunned by that idea.

I guess it is time to get an Enigma emulator out and start playing with it!

   Brian