week08

Come up and ask me questions for 5 mins :)

SAP

  • Recapping what we discussed last week, plus questions
  • Due end of the working week

Questions?

OK so what happened in the lecture?

Safety?

Case Study Time.

Stargate Ghost Problem

  • Daniel looks into the eye of a Crystal Skull found by explorer Nick
  • Nick claims looking into the skull will let you see an Alien
  • Daniel can no longer be seen by humans
  • Nick is in a Psychiatric Ward and the only person that can hear and speak to Daniel
  • Daniel and Nick need to convince everyone (the major) of what is going on and that
  • Daniel knows how to solve everything

Assumptions

  • Daniel can see and hear the Major
  • Major cannot see and hear Daniel
  • Daniel cannot affect anything physically in the real world
  • There’s no other communication channel apart from speaking via the Alien who relays his messages to the major
  • Alien can speak to Daniel -> Daniel can hear the Major
  • Daniel speaks to the Major through the Alien

Link for Jesse

Did anyone do the Houdini Case study?

  • Untrusted Medium
  • Need something that can be done without elaborate technology.
  • Needs to be resistant to human error
  • Can be used multiple times.

Integrity Matters

Thoughts about this study

  • DOS?
  • They already have shared secrets
  • Replay Attacks…