Re: A Very Good Hidden Algorithm-File Encryption Application-Java

From: Douglas Eagleson (eaglesondouglas_at_yahoo.com)
Date: 10/28/05 

Date: 28 Oct 2005 11:23:07 -0700

Jean-Luc Cooke wrote:
> readme.txt
>
> "A modified DES Implementation, NIST: FIPS PUB 46-2, 1993- The S-box
> relation was removed
> making it a complete shuffle."
>
> also,
>
> "The s-block values within this implementation have been changed so that
> there is no way to encypt/decrypt a Standard DES implementation. The
> program will function quite nicely as a stand-alone application.
>
> FYI- The s-block values do not have the effect of increasing encryption
> complexity."
>
> Hey, Dougie - can you please justify your s-box selection?
>
> JLC
>
> Douglas Eagleson <eaglesondouglas@yahoo.com> wrote:
> > the link broke sorry. It is at the old os/2 hobbes site.
>
> > pub/java/apps/misc
>
> > moddes.zip is the file.
>
>
> --

I worked to remove the s-box while the actual array code still exists.
And to make the box output number the same as the index selction was
the method. Ergo no transformation was effected.

 And the rest of the modification was to hide the actual indexes of the
shuffle. Making an unknown and hard to decompile class.

Douglas Eagleson
Gaithersburg, mD uSA