The key file is called emkey.ora. It is located in the following directories:
For single instance databases:
For Oracle RAC databases:
However, this does not seem well documented, and I can't find anywhere that seems to describe what "secure mode" actually is.
Oracle Database 11g New Features is coming soon!! We are in the final stage before it goes to the printer (it's called page proofs). The book should be out in time for OOW!
End of line...... (for now)