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Re: Enigma rotor made of PCBs

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"Quadibloc" wrote:

> On Friday, October 23, 2015 at 9:24:22 AM UTC-6, Osmium wrote:
>> In my mind, I guess, I think the Enigma is not very
>> breakable at all.  To me, the most interesting question is: "Can the 
>> Enigma
>> be broken without cribs"?  My tentative answer is "no", in other words a
>> workable protocol for usage can be established and the Enigma is 
>> virtually
>> unbreakable. Today.
>
> For a few short messages sent with a given set of rotor wirings, and if 
> the
> starting position of the rotors is treated as part of the key - taken from 
> a
> one-time keybook for every message - it might well be unbreakable today.
>
> That wouldn't make it a useful cipher for practical purposes today - in 
> any
> real-world usage scenario, it would be quite breakable indeed.

I guess we disagree. However, I think we are discussing gradations of 
infinity.  Since my Enigma protocol is mostly imaginary, but a necessary 
part of a resolution, we can't resolve it.

I assume that, because of speed constraints, only keys are exchanged by 
Diffie-Hellman techniques and real messages, such as bank transfers, use 
something more mundane like DES.  I Would expect new keys to be exchanged 
infrequently, say monthly or yearly. The DH password is for life, the life 
of a person or an organization.

A perfect technique would allow any message as a possible decrypt.  If I 
saw *an* Enigma decrypt I would most likely think it was an actual message 
decrypt tether than a chance result. OTOH if I saw such from a 
Diffie-Hellamn message with a sizeable key it seems, somehow, a more 
credible claim.  But either of those *could be*  freak instances, neither 
system is perfect. After all, it doesn't take a very long message to 
transfer a hundred billion Euros from one account to another. 

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Enigma rotor made of PCBs davidmylastname@acm.org (David Griffith) - 2015-10-17 01:47 +0000
  Re: Enigma rotor made of PCBs Dave Garland <dave.garland@wizinfo.com> - 2015-10-16 22:18 -0500
    Re: Enigma rotor made of PCBs scott@slp53.sl.home (Scott Lurndal) - 2015-10-19 13:11 +0000
  Re: Enigma rotor made of PCBs Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2015-10-16 21:44 -0600
  Re: Enigma rotor made of PCBs Jon Elson <elson@pico-systems.com> - 2015-10-21 11:35 -0500
    Re: Enigma rotor made of PCBs Greymaus <mausg@mail.com> - 2015-10-22 11:38 +0000
      Re: Enigma rotor made of PCBs "gareth" <no.spam@thank.you.invalid> - 2015-10-22 16:18 +0100
        Re: Enigma rotor made of PCBs Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-22 18:22 +0000
          Re: Enigma rotor made of PCBs Quadibloc <jsavard@ecn.ab.ca> - 2015-10-22 17:32 -0700
        Re: Enigma rotor made of PCBs "78lp" <78lp@nospam.com> - 2015-10-23 14:14 +1100
      Re: Enigma rotor made of PCBs Michael Black <et472@ncf.ca> - 2015-10-22 11:48 -0400
      Re: Enigma rotor made of PCBs Quadibloc <jsavard@ecn.ab.ca> - 2015-10-22 11:08 -0700
      Re: Enigma rotor made of PCBs "78lp" <78lp@nospam.com> - 2015-10-23 14:21 +1100
        Re: Enigma rotor made of PCBs Morten Reistad <first@last.name.invalid> - 2015-10-23 10:43 +0200
          Re: Enigma rotor made of PCBs Greymaus <mausg@mail.com> - 2015-10-23 11:06 +0000
            Re: Enigma rotor made of PCBs "Osmium" <r124c4u102@comcast.net> - 2015-10-23 10:00 -0500
              Re: Enigma rotor made of PCBs "gareth" <no.spam@thank.you.invalid> - 2015-10-23 16:22 +0100
              Re: Enigma rotor made of PCBs Greymaus <mausg@mail.com> - 2015-10-23 17:27 +0000
              Re: Enigma rotor made of PCBs Michael Black <et472@ncf.ca> - 2015-10-23 13:40 -0400
                Re: Enigma rotor made of PCBs Stan Barr <plan.b@bluesomatic.org> - 2015-10-24 06:54 +0000
                Re: Enigma rotor made of PCBs Greymaus <mausg@mail.com> - 2015-10-24 10:57 +0000
                Re: Enigma rotor made of PCBs "Charles Richmond" <numerist@aquaporin4.com> - 2015-10-25 18:47 -0500
            Re: Enigma rotor made of PCBs "78lp" <78lp@nospam.com> - 2015-10-24 12:36 +1100
          Re: Enigma rotor made of PCBs "78lp" <78lp@nospam.com> - 2015-10-24 12:29 +1100
        Re: Enigma rotor made of PCBs "Osmium" <r124c4u102@comcast.net> - 2015-10-23 10:24 -0500
          Re: Enigma rotor made of PCBs Quadibloc <jsavard@ecn.ab.ca> - 2015-10-23 10:32 -0700
            Re: Enigma rotor made of PCBs "Osmium" <r124c4u102@comcast.net> - 2015-10-23 13:51 -0500
            Re: Enigma rotor made of PCBs Greymaus <mausg@mail.com> - 2015-10-24 10:36 +0000
          Re: Enigma rotor made of PCBs Michael Black <et472@ncf.ca> - 2015-10-23 13:36 -0400
            Re: Enigma rotor made of PCBs Jon Elson <elson@pico-systems.com> - 2015-10-23 15:13 -0500
              Re: Enigma rotor made of PCBs danny burstein <dannyb@panix.com> - 2015-10-23 20:25 +0000
                Re: Enigma rotor made of PCBs "Osmium" <r124c4u102@comcast.net> - 2015-10-23 15:51 -0500
                Re: Enigma rotor made of PCBs "Osmium" <r124c4u102@comcast.net> - 2015-10-23 15:59 -0500
                Re: Enigma rotor made of PCBs David Wade <dave.g4ugm@gmail.com> - 2015-10-24 18:51 +0100
                Re: Enigma rotor made of PCBs Walter Bushell <proto@panix.com> - 2015-11-20 21:33 -0500
                Re: Enigma rotor made of PCBs Jon Elson <elson@pico-systems.com> - 2015-11-20 23:12 -0600
            Re: Enigma rotor made of PCBs Gene Wirchenko <genew@telus.net> - 2015-10-23 14:14 -0700
              Re: Enigma rotor made of PCBs Bob Eager <news0005@eager.cx> - 2015-10-23 22:10 +0000
                Re: Enigma rotor made of PCBs Morten Reistad <first@last.name.invalid> - 2015-10-24 09:10 +0200
              Re: Enigma rotor made of PCBs JimP <solosam90@gmail.com> - 2015-10-23 19:19 -0500
              Re: Enigma rotor made of PCBs Dave Garland <dave.garland@wizinfo.com> - 2015-10-23 20:13 -0500
                Re: Enigma rotor made of PCBs Michael Black <et472@ncf.ca> - 2015-10-24 09:13 -0400
            Re: Enigma rotor made of PCBs Greymaus <mausg@mail.com> - 2015-10-24 10:47 +0000
          Re: Enigma rotor made of PCBs Jon Elson <elson@pico-systems.com> - 2015-10-23 14:46 -0500
            Re: Enigma rotor made of PCBs "Osmium" <r124c4u102@comcast.net> - 2015-10-23 15:48 -0500
  Re: Enigma rotor made of PCBs barrym95838@yahoo.com - 2015-10-22 23:40 -0700

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