signed mail + steganography = ?

[CVL staff member Nate Sammons]

-----BEGIN PGP SIGNED MESSAGE-----


writes Peter Baumbach:
>
>What if you couldn't tell when a letter was signed unless you new the  
>public key of the person signing it?  How could this be done?  Encode 
>the digital signature with steganography.  Is this possible when  
>steganography alters the very message you wish to sign?  I don't know. 
>  
>The benefit of this is signed and unsigned messages look like each other. 
>People can't be lazy anymore and just assume the signature is yours.  
>Your boss isn't likely going to notice you used pgp to sign your mail. 
>  
>Peter Baumbach
>baumbach at atmel.com
> 
>  

What if you were to use a higher number of bits per character than 
ascii?  Then you could use the highest (or lowest) bit for a signature.

This may not be such a good idea for ascii mail, but if there is ever
a real "multi-media" (I _hate_ that term) mail, such as 'ol NeXTmail,
then I can see how it would be easy to squeeze in a signature.

- -nate

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