device identifier (see SIMPLE work)  --> list of AORs + device-specific
    configuration
   new device: authentication via ?
     only care about first-time
     how to associate AORs with that device?
   incremental deployment - one new phone at a time
     user plugs in
     phone displays short numeric code or word - user types in code

AOR (external input to protocol -- memory stick, SIM card, manual entry)
   + password
   subscribe to AOR

introduction
requirements
overview - give examples


event description