Quote:
Originally Posted by kovidgoyal
2) It is impossible to prevent a digital file from being copied by its intended recipient. Not impractical, not difficult, but impossible
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AFAIK, it's impossible to keep a digital file from being copied by *anyone*--it's just that the key to access to the contents may only be available to to the intended recipient.
Anyone can technically make copies; it's just that nobody sues over unreadable copies.
But this means that, even without the Nifty Magic Key that allows the recipient to open the file properly, someone else with enough resources could open the file. (I think Convertlit will work on DRM'd .lit files, even away from the original computer.) Current encryption tech is such that this is difficult, maybe impossible on a practical level, but that may not last.