Quote:
Originally Posted by jhowell
I have a Kindle running 5.18.5 and so far I have had no problem even with a book that was published yesterday.
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I updated a second Kindle that I own to 5.18.5 and that device immediately began using the new DRM.
This DRM is applied to any newly downloaded books regardless of purchase or publication date. However it is not applied to books where the publisher has requested the DRM not be used, as shown on its sales page with "Simultaneous device usage : Unlimited" in the product details.
This new DRM uses an account secret stored in an inaccessible location as part of the key needed to unlock the encryption of the book. The only hope of being able to remove it requires access to that storage, which is only possible if the device was jailbroken prior to being updated to the new firmware.