ePub gets (yet) another DRM system

[Quoth]

Anyone remember previous Amazon DRM after they bought Mobipocket? Or MS "Plays For Sure"?

[underscore]

Originally Posted by Leseratte_10

You just need to keep backups of the original books.

If I understand the standard correctly, then the client is supposed to update the license definition file included in the eBook whenever it receives a status update (like a revocation) from the server. So if you are able to open a particular book right now, and you make a backup of that book file, you'll always be able to open that book even if the license gets revoked (as long as you know your account password). The reader might update (and invalidate) the copy that it has, but if that happens all you'd have to do is disconnect the reader from the internet, replace the revoked book file with the book file from your backup, and then you'll be able to open it again.

Aren't temporary licenses, also in ADE, also tied to the clock of the system?
Like ok, you got the decrypted version once you first connect to the server but then you have 2 weeks to read Proust

[SleepyBob]

Originally Posted by underscore

Aren't temporary licenses, also in ADE, also tied to the clock of the system?
Like ok, you got the decrypted version once you first connect to the server but then you have 2 weeks to read Proust

Something like that, though I don't know the exact mechanism. When I use ADE to download a new library book, I'll get a pop-up that old books have expired and it asks to delete them.

[JSWolf]

Originally Posted by underscore

Aren't temporary licenses, also in ADE, also tied to the clock of the system?
Like ok, you got the decrypted version once you first connect to the server but then you have 2 weeks to read Proust

Yes. That's what Overdrive uses. But it's the same thing as Adobe's Adept DRM in terms of DRM removal.