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Re: Triangulation Cryptography.- The Triangle model is Merely the Box That the Ciphertext Travels In'

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On 17.09.21 22:34, Rich wrote:
> Max <maxturv26@gmx.net> wrote:
>> On 17.09.21 16:35, Richard Heathfield wrote:
>>> On 17/09/2021 14:25, austin obyrne wrote:
>> <snip>
>>>
>>> Since you can only encrypt a limited subset of ASCII, a trial decrypt
>>> that results only in ASCII 32-126 is a fair bet for closer inspection.
>>
>> Tbh, if the whole system works in base, idk, 94 of something, this
>> wouldn't work. But, I doubt this, too and the limitation is of course a
>> bit weird.
> 
> Actually, Austin's 'system' works in binary (although he does not
> realize this) and his "characters" are, likely (MM could say with
> greater accuracy) stored in the Ada equivalent of a C char * string
> (i.e., one byte per character).  And they are stored using the ASCII
> codepoints.  His 'limitation' of ASCII 32-126 is because Ada's text
> mode I/O library (the only one Austin knows how to use) enforces that
> all characters read in from a file (or from a terminal) must lie
> between 32-126 (with special 'behind the scenes' handling of newlines,
> which is why Austin is also ignorant of ASCII newlines).
> 
> But it is most definetly not "base 94".  It is simply ASCII, with each
> code point encoded into a single byte.

I am pretty certain, you are right about that.

> 
> And yes, if one were to perform a brute force run against one of his
> examples, one could immediately reject as invalid any output which had
> any byte with a value other than 32-126 present.  That significantly
> narrows the number of trials that one has to otherwise examine.
> 

Absolutely. I was just playing devil's advocate. I am sure the approach 
I mentioned is not what is happening.

Cheers,

Max

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Triangulation Cryptography.- The Triangle model is Merely the Box That the Ciphertext Travels In' austin obyrne <ao402468@gmail.com> - 2021-09-17 06:25 -0700
  Re: Triangulation Cryptography.- The Triangle model is Merely the Box That the Ciphertext Travels In' Richard Heathfield <rjh@cpax.org.uk> - 2021-09-17 15:35 +0100
    Re: Triangulation Cryptography.- The Triangle model is Merely the Box That the Ciphertext Travels In' Max <maxturv26@gmx.net> - 2021-09-17 17:01 +0200
      Re: Triangulation Cryptography.- The Triangle model is Merely the Box That the Ciphertext Travels In' Rich <rich@example.invalid> - 2021-09-17 20:34 +0000
        Re: Triangulation Cryptography.- The Triangle model is Merely the Box That the Ciphertext Travels In' Max <maxturv26@gmx.net> - 2021-09-17 22:53 +0200

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