9.2 Upgrade (and a question about encryption)

The Upgrade version of 9.2 sells for $59.99 at Amazon, but is priced at $59.95 at Novell! The difference is that you can order the upgrade version from Amazon buy, apparently, not from Novell. Question: The 9.2 on offer is advertised as 128 bit encryption. What is that all about, and what practical difference does it make to the buyer? Thanks dj tuchler