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Old 02-07-2017, 08:08 AM   #58
jhowell
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Posts: 7,099
Karma: 92190113
Join Date: Nov 2011
Location: Charlottesville, VA
Device: Kindles
Quote:
Originally Posted by Ravensknight View Post
Have you downloaded a TOR book from amazon to check this?
There are lots of examples. New Spring by Robert Jordan is published by TOR. It contains the standard blurb: "The author and publisher have provided this e-book to you without Digital Rights Management software (DRM) applied so that you can enjoy reading it on your personal devices."

However, this book has enhanced typesetting and is delivered to Kindle for PC 1.19 and newer e-ink Kindles in KFX format with DRM. (I just tested it again to make sure.)

Added:

You may be wondering, if no one has decoded KFX how do I know that it has DRM?

KFX has been decoded sufficiently for the DRM to be apparent. A KFX book is composed of multiple files only one of which contains encrypted content. The others can be decoded to extract metadata and images. The protected file has a header of "DRMION". (Ion is the name of the binary encoding scheme used by KFX.) It also has a callout to a DRM voucher, which is another file always associated with a KFX book. For example, my copy of New Spring in Kindle for PC has the file "amzn1.drm-voucher.v1.7189ce2c-7fa1-46e3-bbed-18109b5ec2e5.voucher".

Last edited by jhowell; 02-07-2017 at 09:09 AM.
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