> Of course, other programs can grab the information off whatever output device
> is being used. Image grabs are trivial to do, video grabs and audio
> grabs are somewhat harder. A text grab would take some effort and
> some OCR, but is possible. However, one can imagine stumbling blocks
> being put in place that would deter some of these, e.g. ignore certain
> X events etc.
Yes, but given that the point of computerized tools is to make
manipulation easier for the user, this seems counter-productive.
Check out the RSA enhanced browser demo bye CommerceNet
http://www.commerce.net/
http://www.commerce.net/information/examples/demo/cl.secure/cl.info.html
> image/video/audio with the user's key that are not perceptible and
> can't be removed from the information.
http://www.wired.com/Etext/2.03/features/economy.ideas.html
http://www.wired.com/Etext/1.5/departments/idees.fortes/copyright.on.net.html
http://www.wired.com/Etext/1.3/departments/idees.fortes/stallman.copyright.html
http://www.wired.com/Etext/2.07/departments/electrosphere/postscript.html
And especially
http://www.wired.com/Etext/2.08/departments/electric.word.html
in Stop That Copy
which references http://www.research.att.com/#docmark
Christian