| From: | Alan Buxey |
| Date: | 2 Aug 2000 at 17:35:10 |
| Subject: | Re: Programming encryption (poss OT) |
hi,
> Stegography. It gets round the issue that even if your PGP encoded mails
> can't be read, the mere fact that they are encoded is significant.
>
> Stegography hides the encrypted text in a binary file, it could be audio
> or graphic data. so you're not only hiding the contents of the message
> but hiding the fact that you are hiding the contents.
with the Amiga, we have a few ideal formats that can be used. The IFF format
for sounds and images defines seperate HUNKs. If a program doesnt know a
hunk-type it'll skip it. if it knows that type, it'll access and read it. so
in a typical IFF image file, you have a header with IFF info and then the
image chunk. all you need is a program to add the extra HUNK which contains
the encrypted info....the image viewer views the same glorious holiday
snapshot...the decrypter gets your real message out of it :-)
When this was first mentioned to me...oh, about 7 years ago..i was
interested, but it never really seemed to take off - I'd expected the Amiga
people to have come to take this standard (since we have the best gfx and
sound file format to use this method 100% transparently...) but it didnt
take off.
on the PC's there is a tool called S-Tool to do the job. it works on WAVs
and GIFs. I dont know of ANY Amiga tool :-|
alan
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