[Mimedefang] Re: Image spam and broken file formats

[Scott Silva]

Kenneth Porter spake the following on 12/5/2006 1:38 PM:
> --On Tuesday, December 05, 2006 9:34 AM -0500 "Cormack, Ken"
> <ken.cormack at roadway.com> wrote:
> 
>> Some graphics programs for the MAC create images
>> that djpeg was interpereting as being "corrupt".
> 
> Isn't djpeg based on the reference JPEG implementation? What could those
> programs be doing that would irritate a reference implementation?
> 
> In principle, anything our web browsers and email clients can't
> recognize should be treated as garbage, so perhaps whatever library they
> use can be tweaked to do the job.
> 
> 
But there is a lot that can be added to an image without breaking the image.
Just look at steganography. You can hide a lot in an image and still render it
with no visible traces.

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