If you read the post to which the message shown below refers, it would seem that the Book Courier does in fact use encryption that is based on the serial number of each unit. But that isn't a question that can be addressed by anyone on this list, since the Book Courier is not an APH product. -----Original Message----- From: bookport-bounce@xxxxxxxxxxxxx [mailto:bookport-bounce@xxxxxxxxxxxxx] On Behalf Of chris.BP.FL@xxxxxxxxxxxxxxx Sent: Tuesday, October 25, 2005 11:08 AM To: bookport@xxxxxxxxxxxxx Subject: [bookport] Re: Fun facts About the encryption of BC, the following was posted by Katie Walker on 17 Feb 2005 to the BookCourier lIst: //www.freelists.org/archives/bookcourier/02-2005/msg00135.html it's approx. 8 months old, I don't know if there are some more recent developments. Chris Sauer