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Re: CHAL2X

From Max <maxturv26@gmx.net>
Newsgroups sci.crypt
Subject Re: CHAL2X
Date 2021-09-25 23:03 +0200
Organization Aioe.org NNTP Server
Message-ID <sio2rk$urf$1@gioia.aioe.org> (permalink)
References <sii6pv$dqc$1@dont-email.me>

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On 23.09.21 17:34, Richard Heathfield wrote:




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#             POSSIBLE SPOILER AHEAD!                #
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> It is not enough to solve this!
> 
> To win, you must be the first to explain the *whole* (very simple) 
> algorithm. The full Monty, please. How, *precisely* have I encrypted 
> this text?
> 
>   74 59 79 39 59 4A 7A 68 09 7B 7A 6D 7A 38 79 30
>   7A 39 09 08 18 51 31 69 09 08 23 2E 1B 54 69 31
>   7A 6D 7A 49 51 31 50 7A 49 79 29 59 7A 39 09 08
>   39 48 51 31 69 09 08 2E 0D 18 7A 50 68 59 31 59
>   7A 49 09 31 50 7A 31 50 30 79 08 19 59 7A 59 10
>   59 08 50 31 0A 2E 6C 59 30 59 1B 31 7A 59 69 19
>   68 50 7A 50 68 79 50 7A 49 51 31 50 7A 50 79 29
>   59 7A 68 79 08 58 31 2E 54 09 7A 28 09 69 08 7A
>   69 08 7A 6C 61 49 59 08 1B 31 7A 38 79 08 58 31
>   4A 2E 6D 18 7A 50 30 51 50 68 7A 68 09 48 58 31
>   7A 50 30 51 59 7A 39 09 08 50 59 08 50 31 0A 2E
>   65 09 51 7A 79 08 58 7A 61 09 51 7A 08 09 7A 39
>   30 09 31 31 7A 31 68 79 48 48 7A 70 79 30 50 23
>   2E 65 09 51 7A 79 08 58 7A 61 09 51 7A 79 30 59
>   7A 68 59 79 30 50 7A 69 08 7A 68 59 79 30 50 23
>   2E 65 09 51 7A 50 09 7A 68 69 31 7A 48 09 10 59
>   7A 49 51 31 50 7A 79 39 39 09 30 58 4A 2E 0D 30
>   7A 68 79 10 59 7A 79 7A 11 09 49 79 08 7A 50 09
>   7A 61 09 51 30 7A 48 09 30 58 23 2E 65 09 51 7A
>   79 08 58 7A 61 09 51 7A 79 30 59 7A 31 51 30 59
>   7A 50 09 19 59 50 68 59 30 4A 2E 7D 31 7A 50 68
>   59 7A 11 69 08 50 59 30 7A 50 09 7A 18 09 51 48
>   7A 11 59 79 50 68 59 30 0A 2E 15 68 69 48 59 31
>   7A 79 7A 11 59 58 48 09 39 29 4B 68 61 49 08 7A
>   11 59 7A 31 69 08 19 4A 2E 1C 59 59 58 7A 61 09
>   51 30 31 59 48 10 59 31 7A 11 69 50 68 7A 71 51
>   59 31 50 69 09 08 69 08 19 4A 2E 54 68 79 50 7A
>   30 59 79 31 09 08 7A 11 09 08 58 59 30 7A 49 79
>   61 7A 58 69 49 69 08 69 31 68 4A 2E 6C 09 11 7A
>   50 68 51 31 7A 11 59 7A 49 59 50 4A 7A 79 08 58
>   7A 50 68 59 31 59 7A 50 68 69 08 19 31 7A 18 69
>   08 69 31 68 0A 2E
> 



So when I xor a plaintext character with its respective ciphertext 
character I get a binary number whose high nibble is a mirror image of 
its low nibble. Plus bit 1 and bit 8 are always zero. Also, this 
difference stays the same for two consecutive characters. Yet, I do not 
see a pattern how to get to the next difference / key pair...

Just saying.

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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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