Quote:
Originally Posted by Nate the great
What would stop me from making a copy on several SD cards and sticking one in each of several Kindles registered on an account?
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The PID of the
device is needed to decrypt the file. So with a Secure MOBI or Secure AZW file, you can make as many copies as you like but they will only run on devices with the same PID, or PIDs, the file was encrypted for. Amazon could produce one AZW file for all Kindle's on an account, but the direct connection between the Kindle and Amazon's servers make it more likely they regenerate the file on request for the Kindle that is making the request to the server (after checking it is authorized). The other reason I think they have single-PID files is the 6 device limit. So far as I know, the MobiPocket limit is 4 (or less). However, it is certainly possible that the MobiPocket format supports 6 devices, but MobiPocket sets a maximum of 4 for non-technical reasons (e.g. licencing issues).
Now we need to find someone with multiple Kindles on one account to find out for sure.