Quote from: vindapoo on June 26, 2013, 08:55 AM
Perhaps you misunderstand. unlocking a pdf is not hacking. pdf is an open standard and I can print and lock any pdf I like.
No, you can unlock any PDF that you have permission to unlock. When a supplier offers you a PDF for download, he/she may place constraints on what you can do with it. If you accept those terms, then you are bound by them.
QuoteI think you are getting confused as its entirely legitimate in the same was as unzipping a file.
"Legitimate" : in certain circumstances. You can legitimately unzip a ZIP file only if (a) it is not password-protected, or (b) you have been provided with the password by the creator of the ZIP file. Whether or not it is ethical depends entirely on what you plan to do with the PDF after unlocking. For example, suppose you were to take one of Mick's e-books, unlock it, then replace all instances of "food colouring" with "phenolpthaleine" and re-distribute the book. Mick would then be blamed by those who use your hacked recipes for the diarrhoea that they would undoubtedly suffer, and quite probably sued to boot So such a use would be at the very least unethical, and quite possibly illegal. Or you might choose to remove all statements of copyright, and then re-distribute it via BitTorrent; others receiving the hacked copy would then be led to believe that they had every right to distribute further copies, and Mick's income stream would suffer a a result. Also unethical. But suppose you were to unlock it, correct a few typos and then send it back to Mick so that he would have a better master copy to distribute in future. In my opinon, unlocking for such a reason would be ethical ('though of course I do not know if Mick would agree). Or you might want to produce a very high quality bound book that you could show to your friends. Also ethical, in my opinion. But in such circumstances it would be more honourable to contact Mick first, explain your aims, and then ask if he could let you have an unlocked copy subject to your assurance that you would use it only for the purpose stated, and would not pass on the unlocked copy to anyone else. Do /you/ now understand, VP ?
** Phil.