I need to learn more about encryption and DRM - Page 2

Ken Maltby · 10-23-2010, 04:43 PM

The "Ectaco jetBook" forum also hosts discussion about the Aluratek Libra which is the
same hardware as the Ectaco Jetbook.

The Jetbook Lite supports three of the major DRM scams: Adobe Digital Editions (ADE)
for .epub and .pdf files; Secure eReader for .pdb files; and the B&N also .epub.

Luck;
Ken

jbcohen · 10-24-2010, 08:34 PM

I know that this may be some what of a really big question, but in the real world I am an Network Administrator and as such I need to understand all things computers so my question is this:

How does DRM work?

GeoffC · 10-25-2010, 03:11 AM

wiki.mobileread.com/wiki/DRM

HarryT · 10-25-2010, 04:18 AM

The way that Mobipocket DRM works is that the device itself has an identifier, called a "PID" - an alphanumeric string. When you buy the book, the bookstore's DRM server encodes the file using the PID as an encryption key, and the device itself decrypts it using its own PID as the decryption key. A Mobi book can coded such that it will work with up to 4 different PIDs (although Amazon only ever encode a book for a single PID).

Obviously this means that the bookstore has to know the device PID before you can download the book. In the case of Amazon, you select which of your registered Kindles to sent the book to, and Amazon know the device PID from their own database. In the case of an independent Mobi bookstore, there's always a form allowing you to tell the bookstore what the PID of your device is.

jbcohen · 10-25-2010, 08:15 AM

Excellent short discussion on how DRM works harry, unfortunately I have examiend the Wiki on the mater before and as an IT professional I need a deeper level of understanding of DRM and how it works then what the wiki describes. I guess if I new ebook store managed to hack a mobipocket one could manage to get the PID off the reader and encode the same PID into estore's product and thus be able to sell ebooks for the mobipocket.

HarryT · 10-25-2010, 08:26 AM

Quote:

Originally Posted by jbcohen

Excellent short discussion on how DRM works harry, unfortunately I have examiend the Wiki on the mater before and as an IT professional I need a deeper level of understanding of DRM and how it works then what the wiki describes.

Why do you "need" a deeper understanding of it, as a matter of interest? I am an IT professional too, but it really is not necessary to have an in-depth understanding of encryption algorithms to be able to buy eBooks!

.

GeoffC · 10-25-2010, 09:49 AM

Try here

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10-23-2010, 04:43 PM	#16
Ken Maltby Wizard Posts: 4,465 Karma: 6900052 Join Date: Dec 2009 Location: The Heart of Texas Device: Boox Note2, AuraHD, PDA,	The "Ectaco jetBook" forum also hosts discussion about the Aluratek Libra which is the same hardware as the Ectaco Jetbook. The Jetbook Lite supports three of the major DRM scams: Adobe Digital Editions (ADE) for .epub and .pdf files; Secure eReader for .pdb files; and the B&N also .epub. Luck; Ken

10-24-2010, 08:34 PM	#17
jbcohen Wizard Posts: 3,025 Karma: 11196738 Join Date: Oct 2010 Location: Piper College Device: Samsung A21	I know that this may be some what of a really big question, but in the real world I am an Network Administrator and as such I need to understand all things computers so my question is this: How does DRM work?

10-25-2010, 03:11 AM	#18
GeoffC Chocolate Grasshopper ... Posts: 27,600 Karma: 20821184 Join Date: Mar 2008 Location: Scotland Device: Muse HD , Cybook Gen3 , Pocketbook 302 (Black) , Nexus 10: wife has PW	wiki.mobileread.com/wiki/DRM

10-25-2010, 04:18 AM	#19
HarryT eBook Enthusiast Posts: 85,544 Karma: 93383043 Join Date: Nov 2006 Location: UK Device: Kindle Oasis 2, iPad Pro 10.5", iPhone 6	The way that Mobipocket DRM works is that the device itself has an identifier, called a "PID" - an alphanumeric string. When you buy the book, the bookstore's DRM server encodes the file using the PID as an encryption key, and the device itself decrypts it using its own PID as the decryption key. A Mobi book can coded such that it will work with up to 4 different PIDs (although Amazon only ever encode a book for a single PID). Obviously this means that the bookstore has to know the device PID before you can download the book. In the case of Amazon, you select which of your registered Kindles to sent the book to, and Amazon know the device PID from their own database. In the case of an independent Mobi bookstore, there's always a form allowing you to tell the bookstore what the PID of your device is.

10-25-2010, 08:15 AM	#20
jbcohen Wizard Posts: 3,025 Karma: 11196738 Join Date: Oct 2010 Location: Piper College Device: Samsung A21	Excellent short discussion on how DRM works harry, unfortunately I have examiend the Wiki on the mater before and as an IT professional I need a deeper level of understanding of DRM and how it works then what the wiki describes. I guess if I new ebook store managed to hack a mobipocket one could manage to get the PID off the reader and encode the same PID into estore's product and thus be able to sell ebooks for the mobipocket.

10-25-2010, 09:49 AM	#22
GeoffC Chocolate Grasshopper ... Posts: 27,600 Karma: 20821184 Join Date: Mar 2008 Location: Scotland Device: Muse HD , Cybook Gen3 , Pocketbook 302 (Black) , Nexus 10: wife has PW	Try here

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