• Amazon’s latest Kindle update makes it almost impossible to remove DRM from newly downloaded e-books. • A jailbreak specialist says the e-books are now tied to a hidden “account secret” only accessible with a previously jailbroken device. • It follows earlier restrictions like removing USB transfers and blocking downloads on older versions of the Kindle Android app.

Amazon just rolled out a change to its Kindle e-readers that could frustrate anyone who likes to keep permanent copies of their e-books. The newest firmware update, version 5.18.5, strengthens Amazon’s Digital Rights Management (DRM) — the copy-protection system that prevents people from freely backing up or transferring Kindle books.

Goodereader reported the change, citing a post on the Mobileread forum that the public

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