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Originally Posted by SteveHoward999
So you could actually tell them any 16-digit number?
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No. They check against a formula.
Your CC isn't stored in the ebook. It is a one way hash. So when you put your CC into the eReader app, it goes through a complex calculation and comes up with a number. That number is also the same calc that eReader.com does to lock the ebook. It is
almost impossible to come back to your CC# from that number. See
http://www.aspencrypt.com/crypto101_hash.html for more info. Bottom line is it would require more computing effort and time to extract your CC than it would be worth based on the credit limit of your CC, and even then they still don't have the date, your name or the CVN number. On top of that, the ebook is stored on a secure server on their system and only downloaded to you via SSL.
I'd be worried
far more about Billy Bob taking your CC info at Wal-Mart to charge your purchase.