Thread: Public Key Cryptography
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Old 03-26-2008, 06:26 PM   #24
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Quote:
Originally Posted by Taylor514ce View Post
The software does the decryption, not the user. The files on the file system stay encrypted.
So you only "own" the book while you can still run the software they provide under whatever conditions they choose to impose on the day. That's exactly the same as current DRM systems, with all the same problems and flaws.

You can't have "open" and "locked against the user" in the same place, it just does not work. Whether you can have the latter at all is an open question (at least to some people). If you simply say "here's an algorithm and a sample implementation, send us your public key" you're using PKI, otherwise it's DRM. Most existing DRM systems already use variants of PKI somewhere, adding it does not make your DRM special.
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