Differentiating spoofing from session hijacking is important. If you use the internet, tell us two measures you take to protect yourself against session hijacking.

The use of a firewall helps to protect your computer from threats that might originate from the outside world.When dealing with packet filtering software, it is important to follow a few best practises that have been established for the programme.

Multifactor authentication is unclear to me. How does it protect stolen passwords?

Beyond message authentication, what other options are available for establishing trust between sender and receiver?