Superimpose a coded lock on USPS

1. 1. 1. Requires two-factor authentication
         • what you know  (the code)
         • what you have (the key)
      2. Imposes time delay to get through coded lock
         • Try various codes or break the lock
         • Sufficient time to call the authorities
      3. Works extremely well when installed
         • Thieves look at the lock and go away
         • Seeing cameras and speakers do not return