Tweaked Section 5 of Encryption Syntax and Processing

Attached is Section 5 with changes to make the way in which
a shared key is derived from a shared secret produced by a
Key Agreement algorithm dependent on that algorithm and to
mention that Key Transport algorithms can be used for data
encryption as well as key encryption.  A few other minor
editorial fixes also made...

Donald 
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Donald E. Eastlake 3rd         Donald.Eastlake@motorola.com
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