Ticket #9 says"If the authentication fails in such ways that the entries
cannot create IKE SA (authentication failure or similar), then the response
will be unencrypted, unauthenticated notify."  Back in January there was
additional discussion about this issue.  Several people supported sending
the response as an encrypted, authenticated notify.  The reason being that
the only entity who can send an encrypted, authenticated notify is the
person with knowledge of  SK_e* and SK_a*.

Have we reach a decision yet?  I thought we decided it was ok to send an
encrypted, authenticated notify in this case and the initiator could take
action on it because he knows it came from the person that he performed the
DH exchange with, but the ticket does not reflect that.

Dave Wierbowski
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