Register Guidelines E-Books Search Today's Posts Mark Forums Read

Go Back   MobileRead Forums > E-Book Formats > ePub

Notices

Reply
 
Thread Tools Search this Thread
Old 03-09-2012, 04:45 PM   #1
elielscott
Junior Member
elielscott began at the beginning.
 
Posts: 2
Karma: 10
Join Date: Mar 2012
Device: iPad
ePub encryption possible?

Hi, I am new to the forum and will introduce myself properly when I'm not in such a crunch for time. Meanwhile....

I'm using OSX (10.5.8) and CS5 (will soon upgrade to 5.5). My client has an aviation manual that I will be converting from InDesign to an ebook (fixed-layout .epub file, via 5.5 and CircularFlo software) so he can sell either through iBookstore or his own website. But he wants to protect the manual with a key so that only designated buyers---i.e. his trained students----have access to it, and so it can't be easily shared. (Ideally, buyers would only have to use the key once, not every time.) At what stage does such encryption happen (layout? conversion? distribution?). This must be common practice---for military, medical, scientific materials and so on----anyone know where can I learn more about how to do it? This is my first foray into encryption. Thanks!
elielscott is offline   Reply With Quote
Old 03-09-2012, 05:02 PM   #2
osnova
Kindler of the Flame
osnova ought to be getting tired of karma fortunes by now.osnova ought to be getting tired of karma fortunes by now.osnova ought to be getting tired of karma fortunes by now.osnova ought to be getting tired of karma fortunes by now.osnova ought to be getting tired of karma fortunes by now.osnova ought to be getting tired of karma fortunes by now.osnova ought to be getting tired of karma fortunes by now.osnova ought to be getting tired of karma fortunes by now.osnova ought to be getting tired of karma fortunes by now.osnova ought to be getting tired of karma fortunes by now.osnova ought to be getting tired of karma fortunes by now.
 
osnova's Avatar
 
Posts: 583
Karma: 646016
Join Date: Oct 2009
Location: US of A
Device: K DX,3,KT,KP,KF, KFHD; Nook C, PRS600, iPad, Xoom, N900, N810, Zaurus
There has been the same question raised (but about DRM, not encryption) about a couple of weeks ago (let me see if I can find the thread). The short answer is selling with DRM from your own site is extremely expensive because it requires a DRM server and licensing fees for Adobe Content Server.

===

Here you go.

Last edited by osnova; 03-09-2012 at 05:07 PM.
osnova is offline   Reply With Quote
Old 03-09-2012, 06:40 PM   #3
elielscott
Junior Member
elielscott began at the beginning.
 
Posts: 2
Karma: 10
Join Date: Mar 2012
Device: iPad
Re: ePub encryption possible?

Thanks, osnova, for your reply. I saw those other threads but none quite addressed my issue. As I understand it, DRM helps prevent unauthorized sharing, and happens at the publisher end (iBookstore, for example), but encryption helps prevent unauthorized access and happens, I think, at the creation end. So say my client decided to use iBookstore, his book may be hard to share thanks to DRM, but unless it is encrypted (i.e., opens with a key), then anyone with the iBook app could buy it, and he wants to limit the buyers to only those authorized to read the material (to whom he will provide the key or password). So to clarify my question, I guess I'd say "Does iBookstore support encryption?" and "Is encryption an affordable process for a relatively small project?" If encryption software, like DRM software, costs $10K, then the answer would be no. But perhaps there are those out there who do encryption for individuals, just as Apple aggregators do conversion and DRM for the individual---I just don't know who that would be or what they would be called. It's important to note, too, that this will be a fixed-layout .epub, not the usual flowing-content .epub, as that might make a difference in the answer. Thanks.
elielscott is offline   Reply With Quote
Old 03-09-2012, 06:45 PM   #4
frostschutz
Linux User
frostschutz ought to be getting tired of karma fortunes by now.frostschutz ought to be getting tired of karma fortunes by now.frostschutz ought to be getting tired of karma fortunes by now.frostschutz ought to be getting tired of karma fortunes by now.frostschutz ought to be getting tired of karma fortunes by now.frostschutz ought to be getting tired of karma fortunes by now.frostschutz ought to be getting tired of karma fortunes by now.frostschutz ought to be getting tired of karma fortunes by now.frostschutz ought to be getting tired of karma fortunes by now.frostschutz ought to be getting tired of karma fortunes by now.frostschutz ought to be getting tired of karma fortunes by now.
 
frostschutz's Avatar
 
Posts: 738
Karma: 2030839
Join Date: Sep 2010
Device: iriver Story HD
Your best bet is to sell it through your site only, and only to known customers. You can not prevent the buyers from sharing the document. If it was possible it would be employed already (aka DRM) but all systems so far have proved uneffective.

Actually the only somewhat effective form of DRM is printing it on paper. All other forms of DRM can be broken in a second with software that can be downloaded for free; paper has to be scanned or photocopied, which takes a lot longer than a second and comes at possible additional cost of material.
frostschutz is offline   Reply With Quote
Old 03-09-2012, 07:00 PM   #5
wallcraft
reader
wallcraft ought to be getting tired of karma fortunes by now.wallcraft ought to be getting tired of karma fortunes by now.wallcraft ought to be getting tired of karma fortunes by now.wallcraft ought to be getting tired of karma fortunes by now.wallcraft ought to be getting tired of karma fortunes by now.wallcraft ought to be getting tired of karma fortunes by now.wallcraft ought to be getting tired of karma fortunes by now.wallcraft ought to be getting tired of karma fortunes by now.wallcraft ought to be getting tired of karma fortunes by now.wallcraft ought to be getting tired of karma fortunes by now.wallcraft ought to be getting tired of karma fortunes by now.
 
wallcraft's Avatar
 
Posts: 6,979
Karma: 5183568
Join Date: Mar 2006
Location: Mississippi, USA
Device: Kindle 3 and Fire
The issue with encryption is that the reader app has to be able to decrypt. So you have to use a standard scheme. Since one of the revenue streams for DRM owners is adding DRM for publishers, they don't tend to be interested in inexpensive encryption options.

In principle, the Adobe password-based ePub encryption (most used by Barnes and Noble, but supported on several reading devices and apps) could be reverse engineered and made available to everyone. No one has done this because a) those with the skills needed are more interested in DRM-stripping than DRM-adding, and b) Adobe might sue the authors of the encryption program. I don't know that Adobe would have a case, but that never seems to stop large corporations.
wallcraft is offline   Reply With Quote
Old 03-10-2012, 04:22 AM   #6
Jellby
frumious Bandersnatch
Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.
 
Jellby's Avatar
 
Posts: 6,045
Karma: 4347035
Join Date: Jan 2008
Location: Spaniard in Sweden
Device: Cybook Orizon, Kobo Aura
You could encrypt the ePub as any other file (zip with a password, or similar). Then the end user would have to unencrypt it. But once this is done, the unencrypted file can be copied, shared and viewed unrestrictedly...
Jellby is online now   Reply With Quote
Old 03-10-2012, 04:44 PM   #7
JSWolf
Resident Curmudgeon
JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.
 
JSWolf's Avatar
 
Posts: 36,468
Karma: 17660776
Join Date: Nov 2006
Location: Roslindale, Massachusetts
Device: Sony Reader PRS-650, iPad, nook STR
Quote:
Originally Posted by Jellby View Post
You could encrypt the ePub as any other file (zip with a password, or similar). Then the end user would have to unencrypt it. But once this is done, the unencrypted file can be copied, shared and viewed unrestrictedly...
But, even if it was encrypted and the person wanted to give it out, all that would need be done is give the key with the copy and there you go.

There is no foolproof method to make this eBook secure.
JSWolf is online now   Reply With Quote
Old 03-11-2012, 07:30 AM   #8
Jellby
frumious Bandersnatch
Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.Jellby ought to be getting tired of karma fortunes by now.
 
Jellby's Avatar
 
Posts: 6,045
Karma: 4347035
Join Date: Jan 2008
Location: Spaniard in Sweden
Device: Cybook Orizon, Kobo Aura
Unless you use a pair of public-private keys, and encrypt it so that it can only be unencrypted with the other person's private key. Of course, the other person could give the private key to someone else, but it's called "private" for a reason.
Jellby is online now   Reply With Quote
Old 03-17-2012, 08:34 AM   #9
VicLavigne
e-reading since 2008
VicLavigne goes to infinity... and beyond!VicLavigne goes to infinity... and beyond!VicLavigne goes to infinity... and beyond!VicLavigne goes to infinity... and beyond!VicLavigne goes to infinity... and beyond!VicLavigne goes to infinity... and beyond!VicLavigne goes to infinity... and beyond!VicLavigne goes to infinity... and beyond!VicLavigne goes to infinity... and beyond!VicLavigne goes to infinity... and beyond!VicLavigne goes to infinity... and beyond!
 
VicLavigne's Avatar
 
Posts: 197
Karma: 112730
Join Date: Oct 2008
Location: Hinesville Georgia
Device: Nook STR, Sony PRS-T1
B&N uses a DRM method that includes the buyer's credit card number. That is pretty slick, since most buyers wouldn't want to share that.

But encryption and DRM are not foolproof and users will find ways to share if they want to. IMO, your client should think more about his process for selling. For example, if he wants to sell to students, he should make the ebook price part of the class price, which would reduce any incentive to sharing the book. If he wants to charge a really high price for the ebook - which will also lead to the desire to share/borrow - he should reconsider pricing strategy..... people are willing to pay for items if they don't think they are getting ripped off. If he still wants a high price for his work, spllit the book into multiple volumes so the cumulative price gets closer to what he wants.

That's just my 2 cents. Also some food for thought: how much money would JK Rowling have made from ebook versions of the Harry Potter series if she had released them and priced them effectively? I think we all know that people would have bought retail versions of the ebooks..... but since retail versions don't exist, she has not made a cent from them.

Vic
VicLavigne is offline   Reply With Quote
Old 03-17-2012, 09:08 AM   #10
Rob Lister
Fanatic
Rob Lister ought to be getting tired of karma fortunes by now.Rob Lister ought to be getting tired of karma fortunes by now.Rob Lister ought to be getting tired of karma fortunes by now.Rob Lister ought to be getting tired of karma fortunes by now.Rob Lister ought to be getting tired of karma fortunes by now.Rob Lister ought to be getting tired of karma fortunes by now.Rob Lister ought to be getting tired of karma fortunes by now.Rob Lister ought to be getting tired of karma fortunes by now.Rob Lister ought to be getting tired of karma fortunes by now.Rob Lister ought to be getting tired of karma fortunes by now.Rob Lister ought to be getting tired of karma fortunes by now.
 
Posts: 533
Karma: 3293888
Join Date: Oct 2011
Location: Virginia
Device: Nook Simple Touch
To nutshell it, what the OP wants is really the Holy Grail of DRM. If he invents it, he could certainly make a mint (assuming nobody stole it )

Imagine that, a epub encrypted using the very DNA of the buyer. Even then, the evil identical twin would likely pirate it.
Rob Lister is offline   Reply With Quote
Reply

Tags
encryption, epub, indesign cs5.5

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
fontencrypt.py - Add Adobe encryption to fonts in ePub pdurrant ePub 14 10-15-2013 09:16 AM
re-encryption therinken Nook Developer's Corner 1 02-27-2011 12:32 PM
I need to learn more about encryption and DRM jbcohen General Discussions 21 10-25-2010 09:49 AM
iPad iBooks, ePub, embedded fonts & encryption pdurrant Apple Devices 37 06-08-2010 01:24 PM
Email Encryption.. Do you use it? Bob Russell Lounge 8 06-17-2006 04:33 AM


All times are GMT -4. The time now is 02:32 PM.


MobileRead.com is a privately owned, operated and funded community.