Le 16 avr. 07 à 04:23 Matin, William Squires a écrit:

>    If I remember, Base64 encoding produces a sequence of characters
> that are limited to only printable characters, no?

Yes, but scrambling does not necessarily mean having non-printable  
characters in the result.

> And neither
> reversing, nor ones-complement will change the character frequency of
> the resultant cyphertext, so it's not much better than an ordinary
> substitution cypher.

I agree, but in Lennox's post, he said he wanted a "limited" scrambling.

I quote his question:
"so that it is not easily read if opened by any text editor app"

For me, that means just that a normal user cannot read the file using  
TextEdit.

> Combine it with the rotating-key XOR to cause
> the output range to include a more well distributed set so as to
> deter easy substitution hacks.

Yes, you can make your own, also.
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