Public Key Exchanges

The videos below are for review only.  Watch them for help when developing protocols for the final challenge.  You can review Modular Arithmetic Here.

Summary:
1. What is the Diffie Hellman Exhange?
2. Why is this a good method?
3. Why is this called a public key exchange?

Diffie Hellman

RSA Exchange

Division Algorithm and Modular Arithmetic

Watch this video as many times as you need. WSQ in your notebooks.  

W = Work out any problems assigned during the video in your notes.

S = Summarize the video.  This can be done using bullets.  List at least 3 things you learned from this video or important things to remember about this lesson.

Q = Question you have or a question someone else might have about the information in the video. This can also be a question that sparks discussion or causes other to think about the topic more deeply.

Summary Questions:

1. How do you know there is a remainder when completing long division?
2. How would you describe modular arithmetic over the phone to a friend?
3. What operation does modular arithmetic use?
4. How does modular arithmetic affect the order of operations?