Cheating Issues in Security and Privacy

1
CheatingIssues in Security and Privacy
Start with demo Coin ripping End with
teaser Untransferable proofs

• Markus Jakobsson
• www.markus-jakobsson.com

2
What is this course about?

• Cheating
• Security
• Privacy
• Protocol Analysis
• Protocol Design

3
What does it take to succeed?

• Read the book? No. (There is no book.)
• Get a good score on the final? No. (There is no
  final.)
• Cheat? Now were getting somewhere!

4
What does it take then?

• Think creatively? Yes.
• Understand lecture material? Yes.
• Read scientific articles? Yes.
• Implement programs to cheat? Yes.
• Mathematical skills? That helps.
• Wanting to win all the time? That, too.

5
More specifically now

• Follow links in lectures, read articles.
• Read lecture notes beforehand - and after!
• Ask questions when you are not sure.
• Come to office hours.
• Speak to classmates and AI.

6
How am I graded?

• 30 Quizzes
• 20 Take-home (Implementation)
• 10 Presentation
• 40 Project (Essay or Implementation)
• Undergrad grad students graded on separate
  curves.

7
So cheating is allowed?

• Well not quite only some types.
• Obvious types of cheating not ok.
• New and interesting ways good!
• Can I copy things? Not without citing.
• Can we collaborate? Sometimes.

8
Excuse me, I dont like to cheat. What should I
do?

• Stop others from cheating you. But first, you
  have to know how they could cheat you. So you
  have to learn to cheat anyway.

9
And now, for some frequently used words.(Take
notes if you are not already.)

• Protocol step-by-step description
• Cheating not following the protocol
• Security no cheating possible
• Malicious cheater wants to hurt others
• Rational cheater wont hurt himself
• Infeasible/impossible there may be an answer,
  but nobody can find it.

10
and some more words

• One-way function (easy to compute, hard to
  invert.)
• Privacy no bad leaks of information
• Denial of service swamping the victim

11
And on the topic of denial of service

• Have a question?
• Ask in class.
• Ask your friends.
• Come to my office hours. (The hour before class.)
• Come to the AIs office hours. (M 1-2, W 11-12)
• Email the AI, Divya (diaggarw_at_indiana.edu)
• but please do not email me

12
What do I benefit from this class?

• It is fun. (But a lot of work.)
• Security is a hot area. (Negative unemployment.)
• Security is good to know even for people who
  dont aim to be security experts. (Educated
  buyers.)
• Bragging rights. (Who else will ask you to
  cheat?)