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Old 05-19-2017, 07:47 PM   #129
jhowell
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Posts: 6,470
Karma: 84000001
Join Date: Nov 2011
Location: Tampa Bay, Florida
Device: Kindles
Quote:
Originally Posted by pdurrant View Post
It's DRM, but using a fixed key known to all Kindle devices that support KFX.
Books that are marked "Simultaneous Device Usage: Unlimited" appear to all use the same decryption key. Books that do not have that designation cannot be transferred between devices in KFX format and may possibly have different encryption keys. There is currently no way to be sure.
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