[Mimedefang] Image blocking idea
Kevin A. McGrail
kmcgrail at pccc.com
Thu Apr 20 10:00:47 EDT 2006
I should have been clearer. I don't even believe they aren't even modifying
the image. Indications are that they are simply truncating or adding random
bits to the file because even a slightly corrupted image is still displayed.
> I expect some ratware is already doing that. You don't need a whole
> new graphic to defeat hashing; just adding random noise to the
> least-significant few bits of each pixel would work fine.
More information about the MIMEDefang