Digital Rights Management
Adobe Digital Editions uses the proprietary ADEPT (Adobe Digital Experience Protection Technology) digital rights management scheme, which is also implemented on some e-book readers, including iPads and many Android devices, but not Kindle. The software locks content to up to six machines and allows the user to view the content on each of them. Barnes & Noble (B&N) ebooks are protected with a variant of ADEPT.
In March 2009, the author of the reverse engineering blog i♥cabbages announced that they had broken the scheme.
Adobe Digital Editions by default on Windows machines stores .pdf files of the documents in My Documents/My Digital Editions, where they can be copied and handled like other files, but they cannot be opened except with Adobe Digital Editions. Adobe's website has virtually no information on Adept except on its trademark page and a statement that OverDrive is compatible.
Read more about this topic: Adobe Digital Editions
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