[Cialug] Complete C source online

[Scott Yates]

Yes, this!!


On Wed, Jul 24, 2013 at 7:20 PM, kristau <kristau at gmail.com> wrote:

> What you should do to *really* confuse the NSA is only encrypt random data.
> . .
>
>
> On Wed, Jul 24, 2013 at 7:11 PM, Morris Dovey <mrdovey at iedu.com> wrote:
>
> > On 7/24/13 3:33 PM, Jeffrey Ollie wrote:
> >
> >> What's the encryption algorithm used here?  Based on the lack of
> >> comments in the code am I right that this is an algorithm that you've
> >> invented yourself?
> >>
> >
> > The sample program can perform three operations on an entire file:
> > [1] It can move every byte to another (randomly selected) byte position;
> > [2] It can move every bit to another (randomly selected) bit position;
> > [3] It can (randomly) complement/not complement each and every bit.
> >
> > Each of the operations is prefaced by seeding the PRNG with a portion of
> > the key, and then the operation to be performed is selected randomly.
> >
> > This process is repeated until the entire key has been used up. The
> actual
> > code that does this is the line:
> >
> > for (i=0; i<KEYS; i++) op[key[(h + i) % KEYS] % nops](key[i],b,n);
> >
> > where KEYS is the number of elements in key[];
> >       key[] is the array that contains the key;
> >       nops  is the number of elements in op[];
> >       op[]  is an array of function pointers;
> >       b     is a pointer to the file data;
> >       n     is the length of the file;
> >       h     is one half the number of key elements;
> >       i     is the loop index
> >
> > It’s hard to think of this as an “invention” - it’s more like a
> > straight-forward way to FUBAR a file so thoroughly that without the
> > original key, there’s no feasible way to backtrack to the original data.
> >
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> >
>
>
>
> --
> Tired programmer
> Coding late into the night
> The core dump follows
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