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[STDS-802-16-MOBILE] [security] Pre-authentication discussion



 From the discussion about post-handoff authentication, there seems to
be consensus in the adhoc for Jung-won's idea that two mechanisms will
co-exist:

    1)  Pre-authentication
    2) Backbone Transfer of Derived Context (suitably secured obviously)

I'd like to hear adhoc-ers' views on how generally to support
pre-authentication in PKMv2.

The mechanism we choose for supporting pre-authentication has
potentially significant implications.  The requirements for pre-auth
support would be:

  1. Well-understood  behaviour
  2. Facilitate pre-auth to a BS on the same provider or a different
provider.
  3. Enable establishment of the shared-secret Pairwise Master Key and
determination of success/failure of the authentication
  4. Do not preclude pre-auth to different media (via 802.21 or
what-have-you).  Similarly, do not preclude pre-auth to an unadvertised
neighbor.

802.1X authentication satisfies all of these. The caveat is that for the
moment 802.1X can only be used within a single IP subnet; but extending
it to work over IP has been discussed a lot and seems trivial.


- Jeff Mandin
Security Adhoc Chair