Friday, February 18, 2022 2:30 PM
Libby Taylor

Abstract: Let's say you order some snacks from Amazon.  To do this, you need to give Amazon your credit card number.  This information is sent on a public channel, which means that it's accessible to outside eavesdroppers.  Naturally you don't want a hacker using your card to order his own snacks, so to keep your card number safe, you need a way to encrypt it so that Amazon can figure out your card number but the hacker can't.  


The solution to this problem comes from something called public key cryptography.  One of the best known methods of encryption is the elliptic curve Diffie Hellman key exchange protocol, which I will explain in this talk.  I'll also give a brief overview of some other cryptosystems and discuss the benefits and drawbacks of each.  Here is a motivating question: if I tell you that 5^n is equivalent to 








can you tell me what n is?  If you can solve such problems, please come collect your Fields medal.  If not, then I'll explain on Friday why you (probably) can't do this on your laptop and why that fact is important to the privacy of all our online communications.