Quote:
Originally Posted by lkmiller
I'm not just speculating. I know for certain that for my account the default credit card number is no longer one of those seeds. The basic structure of DRM itself is unchanged. The Nook apps and devices continue working with new and old books because they know the proper hash created from the seeds. The program saves the hash for previously opened books and would receive any new hash when it connects to B&N to sync new books. Other readers and tools no longer work for newly downloaded books because I don't know what seeds to give them to create the new hash.
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Ok, the Seed is a very large number that your CC data is manipulated against to produce a new number, the Hash. If you feed the same data to the same Seed it will result in the same Hash. The Seed is not changed. Your CC data is not the Seed. The CC data can change and that would result in a different Hash Code. The CC data that B&N uses to create the Hash Code they put in the ebook file, is the only set of data that will work to create a matching Hash Code so that the ebook file can be unlocked and/or read.
In my case, B&N created a different Hash Code for my recent purchases by dropping my middle initial from the CC data they used. Which meant that when I tried to use the name that has always worked (with the middle initial) a non-matching Hash Code was created, and the ebook failed to unlock. Once I found the CC data that B&N used for those orders, I could again enter the required CC data to generate a matching Hash Code, and unlock the purchases.
In my case, this was totally B&N's doing, but if you entered a new CC you might have entered something in the name field that caused a problem (the CC Number could not be at fault or the purchase would not have gone through) The CC Number field would be checked, when you entered it so that only allowed numeric characters were entered. The Name field would have to allow for a more broad range of characters.
B&N should not be able to change existing files, so that they work with a new/different Hash Code. You would have to re-download the ebook to get a new file, for that file to unlock with the new Hash Code. I have never seen any attempt to change my old files after connecting to B&N, to buy another book or when opening Nook for PC to have a purchase downloaded.
Luck;
Ken