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Re: Hiding code from intruders, a different slant on an old question

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On Wed, Oct 7, 2015 at 6:01 PM, Dennis Lee Bieber <wlfraed@ix.netcom.com> wrote:
> On Wed, 7 Oct 2015 13:05:07 +0000 (UTC), alister
> <alister.nospam.ware@ntlworld.com> declaimed the following:
>
>
>>With a simple Cesar the method is "shift the alphabet by 'X' characters
>>and X is the key
>>
>>if the key is unknown then the attacker still has to brute force the
>>method (admittedly with only 25 options this is not difficult)
>
>         But who'd consider that with just one-case and alphabet only...
>
>         At the least include upper, lower, numbers, and basic punctuation --
> that will add a few more cycles of computation time to break <G>

It doesn't really matter how much you add; any Caesar cipher is going
to fall easily to just a little bit of frequency analysis. Consider an
extreme case, where the range of X is the size of the entire Unicode
character set. If the message is written in a Latin-based character
set, chances are good that the majority of the characters will fall
within a range of <96, giving the attacker a great starting point to
brute-force from.

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Hiding code from intruders, a different slant on an old question cl@isbd.net - 2015-10-07 10:38 +0100
  Re: Hiding code from intruders, a different slant on an old question "Littlefield, Tyler" <tyler@tysdomain.com> - 2015-10-07 08:00 -0400
  Re: Hiding code from intruders, a different slant on an old question alister <alister.nospam.ware@ntlworld.com> - 2015-10-07 13:05 +0000
    Re: Hiding code from intruders, a different slant on an old question Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2015-10-07 20:01 -0400
      Re: Hiding code from intruders, a different slant on an old question cl@isbd.net - 2015-10-08 11:28 +0100
    Re: Hiding code from intruders, a different slant on an old question Ian Kelly <ian.g.kelly@gmail.com> - 2015-10-08 08:44 -0600
      Re: Hiding code from intruders, a different slant on an old question alister <alister.nospam.ware@ntlworld.com> - 2015-10-08 15:46 +0000
        Re: Hiding code from intruders, a different slant on an old question Ian Kelly <ian.g.kelly@gmail.com> - 2015-10-08 10:33 -0600

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