Re: Enigma rotors - numbered or lettered ??

Craig Heath <craig-mSyzSVBiQZi7jjDMp6nRB7mpYI/[email protected]> Fri, 22 Jun 2012 13:27:15 +0100
Newsgroups gmane.science.cryptography.bletchley-park
Message-ID <CAE3Kp9emz3QspSBE+hd-PTx0RHQunvckXKK=K7ZvQ-HMghZ1VQ@mail.gmail.com>
As to why, I suggest 01-26 makes more sense cryptographically (it's just
the ring position, not a representation of a plaintext or ciphertext
letter) whereas A-Z is easier to transmit in Morse code as part of the
message preamble.  It just seems that the army/air force and the navy
cipher divisions made different choices.

- Craig.
On Jun 22, 2012 11:29 AM, "David Hamer" <[email protected]> wrote:

> Mark...
>
> Enigma: the army and GAF machines used 1-26 index rings - all other
> variants used A-Z...
>
> David H.
>
> At 05:09 06/22/2012, Mark Baldwin wrote:
> >Can anyone explain, please, why the index rings on some Enigma rotors
> >are lettered A - Z, whereas others are numbered 1 - 26?
> >
> >Cryptographically there is no significance, and the A-Z/1-26 conversion
> table
> >is printed on the standard instruction sheet usually attached to the
> inside of the lid.
> >
> >Thanks!
> >Mark Baldwin
>
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> David Hamer                              [email protected]
> http://home.comcast.net/~dhhamer       [email protected]
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