Jim Henderson wrote:
> I'm trying to see how that would work in a sound file, though. 

Futz with the analog before you encode it the first time. It's going to 
be more audible that one that wouldn't survive recodings, but if you 
want a watermark that survives being played out a speaker and 
re-recorded, that's what you need.

I don't know enough about the physics of it to know how to do it, but I 
know it's been done (and broken) multiple times.

-- 
   Darren New / San Diego, CA, USA (PST)
     On what day did God create the body thetans?

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