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Re: CHAL2X

From Max <maxturv26@gmx.net>
Newsgroups sci.crypt
Subject Re: CHAL2X
Date 2021-09-26 00:53 +0200
Organization Aioe.org NNTP Server
Message-ID <sio98g$1a3f$1@gioia.aioe.org> (permalink)
References <sii6pv$dqc$1@dont-email.me> <sio2rk$urf$1@gioia.aioe.org> <sio3fk$n34$1@dont-email.me>

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On 25.09.21 23:14, Richard Heathfield wrote:
> On 25/09/2021 22:03, Max wrote:





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>> Also, this difference stays the same for two consecutive characters.
> 
> I have no idea why that might be. My algorithm did nothing special for 
> two consecutive characters. I conclude that you've done your Bright 
> Eve[1] thing again and have not discerned my algorithm, although you're 
> obviously quite close.
> 
> [1] Not *that* bright. :-) This was solvable using standard techniques 
> to be found in any cryppie's kitchen drawer, and I have no doubt that's 
> how you did it. The one I *was* going to post was more of a bitch but I 
> ran out of wossname, motivation to code it up.
> 


Of course. Just by the book (this time the "and"s, not the "the"s). Yet, 
do you really think, it is possible to find the algorithm before finding 
the plaintext? While some person smarter than me might just eyeball the 
CHATX algorithm from the ciphertext, I don't see how this could be done 
here.

The only way I can think of to recover an algorithm is by looking for 
the most simple way to get from the plaintext to the ciphertext, but for 
that I need the plaintext first, don't I?

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Thread

CHAL2X Richard Heathfield <rjh@cpax.org.uk> - 2021-09-23 16:34 +0100
  Re: CHAL2X Max <maxturv26@gmx.net> - 2021-09-25 19:45 +0200
    Re: CHAL2X Richard Heathfield <rjh@cpax.org.uk> - 2021-09-25 19:04 +0100
      Re: CHAL2X Max <maxturv26@gmx.net> - 2021-09-25 20:08 +0200
  Re: CHAL2X Max <maxturv26@gmx.net> - 2021-09-25 23:03 +0200
    Re: CHAL2X Richard Heathfield <rjh@cpax.org.uk> - 2021-09-25 22:14 +0100
      Re: CHAL2X Max <maxturv26@gmx.net> - 2021-09-26 00:53 +0200
        Re: CHAL2X Richard Heathfield <rjh@cpax.org.uk> - 2021-09-26 06:59 +0100
          Re: CHAL2X Max <maxturv26@gmx.net> - 2021-09-26 14:40 +0200
            Re: CHAL2X Richard Heathfield <rjh@cpax.org.uk> - 2021-09-26 13:58 +0100
              Re: CHAL2X Max <maxturv26@gmx.net> - 2021-09-26 15:54 +0200
                Re: CHAL2X Richard Heathfield <rjh@cpax.org.uk> - 2021-09-26 15:06 +0100
                Re: CHAL2X Max <maxturv26@gmx.net> - 2021-09-26 17:11 +0200
                Re: CHAL2X Richard Heathfield <rjh@cpax.org.uk> - 2021-09-26 16:53 +0100
                Re: CHAL2X Richard Heathfield <rjh@cpax.org.uk> - 2021-09-26 17:12 +0100
                Re: CHAL2X Max <maxturv26@gmx.net> - 2021-09-26 18:42 +0200
                Re: CHAL2X Richard Heathfield <rjh@cpax.org.uk> - 2021-09-26 18:27 +0100
                Re: CHAL2X Max <maxturv26@gmx.net> - 2021-09-26 20:43 +0200
                Re: CHAL2X Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-09-26 20:41 +0100
                Re: CHAL2X Max <maxturv26@gmx.net> - 2021-09-26 21:46 +0200
                Re: CHAL2X Richard Heathfield <rjh@cpax.org.uk> - 2021-09-26 20:57 +0100
                Re: CHAL2X Stefan Claas <spam.trap.usenet@gmail.com> - 2021-09-26 13:19 -0700
                Re: CHAL2X Max <maxturv26@gmx.net> - 2021-09-26 22:30 +0200
                Re: CHAL2X Richard Heathfield <rjh@cpax.org.uk> - 2021-09-26 21:37 +0100
                Re: CHAL2X Richard Heathfield <rjh@cpax.org.uk> - 2021-09-26 21:33 +0100
                Re: CHAL2X Stefan Claas <spam.trap.usenet@gmail.com> - 2021-09-26 13:39 -0700
                Re: CHAL2X Richard Heathfield <rjh@cpax.org.uk> - 2021-09-26 20:53 +0100
                Re: CHAL2X Colin <a@b.com> - 2021-09-27 19:11 +1300
                Re: CHAL2X Richard Heathfield <rjh@cpax.org.uk> - 2021-09-27 07:41 +0100
                Re: CHAL2X Colin <a@b.com> - 2021-09-27 20:02 +1300
                Re: CHAL2X Richard Heathfield <rjh@cpax.org.uk> - 2021-09-27 08:27 +0100
                Re: CHAL2X Colin <a@b.com> - 2021-09-28 20:09 +1300

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