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I was talking about neither of the things you mentioned. Stopping printing and passwords are not the DRM although stopping printing is a small part of it. Opening the file in the first place that is DRM protected to a certain id is what is being discussed here. The same algorithm is used for ADE and PDF files that are locked by a publisher to a specific id.
By cracked I mean code that available to the public to use to remove DRM and permit opening a locked eBook (not a password protected eBook). I suspect the NSA probably can decode any of it. Read the wiki article on DRM.
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