drm 研究

drm 研究

Strutinan07-18-04, 08:13 AM
DRM does not have any hope in hell of working. I could crack DRM "encryption" in about 5 minutes, and I'm not even into the whole piracy thing!

It all comes down to the inherent flaw of DRM: the publisher must provide the user the key to read the file. If it can be displayed on your monitor, it can be copied into otehr formats. Even back into a non-DRM pdf using PDFMaker or Microsoft Imaging/Word (takes a while o do, but ANYBODY can do it). And that is without using any real degree of computer knowledge.

In the meantime you are pissing off your customer base, reducing the amount of people who CAN use your products, and increasing your costs. All for "security" that only really works for users who WOULD NOT BOTHER WITH IT ANYWAY?!?!?! If somebody wants a pirated copy of your book, I can gaurantee you that there is somebody out there who either already has a pirated copy available, or is willing to pirate it.

Hell, in many places today you can check several RPG books out of public libraries. That and a $50 scanner will get you a copy of a DRM book. You could even borrow it form a fanboy of the company with a physical copy, and copy it.

And every potential customer that you piss off by using DRM becomes a potential pirate. :uhoh:
确实有些意思。
drm真的如此脆弱吗？

http://www-2.cs.cmu.edu/~dst/Adobe/Gallery/PDFsecurity.pdf