Quote:
Originally Posted by DiapDealer
Not if there's already backup/alternate methods for encrypting/decrypting built into the device/application--and have been for a while. There's no reason to assume that there's one key, and one key only, that will unlock each book (nor that the devices/apps don't attempt those keys sequentially until one works).
Readmill used a VendorID to unlock uploaded Adobe encrypted epubs without having access to a user's Adobe ID. Yes B&N's passhash method is a different variation than the "usual" Adobe Adept encryption, but it's still provided by Adobe.
But all that would still suggest that reading on approved devices probably wouldn't be affected--only that current DRM-removal procedures might fail upon downloading new files/purchases. |
For the files that B&N uses there is one key/hash that is included in the ebook file. The same hash (Generated by B&N using your CC data, and applied to the ebook file/s) can be used in many files/purchases. The readers (such as Adobe Reader Mobile v 9.1.1 and later) can include the ability to unlock B&N files, because they can use the seed provided when the reader program was encoded, to transform the data the user provides into a hash code. If that hash code matches/is acceptable as a match with what is in the ebook file, then the book can be unlocked and read. (Or in the case of certain tools, unlocked for good.) Subsequent ebook files that use the same Hash code, will be unlocked without asking for the user data, as there is no need for the reader/tool to generate the hash code, it already has a matching one.
Luck;
Ken