Get extended access to 1600+ episodes, binge watch your favorite shows, and stream anytime - online or in the PBS app.
Already a LPB member?
You may have an unactivated LPB Passport member benefit. Check to see.
Season 2 Episode 6 | 9m 36s
Symmetric keys are essential to encrypting messages. How can two people share the same key without someone else getting a hold of it? Upfront asymmetric encryption is one way, but another is Diffie-Hellman key exchange.
Aired: 08/29/18
Video has closed captioning.
The Mathematics of Diffie-Hellman Key Exchange
Can you stack four colored cubes so that each color only shows once on each side?
Unraveling DNA with Rational Tangles
When you think about math, what do you think of knots? Probably... knot.
How Big are All Infinities Combined? (Cantor's Paradox)
Infinities come in different sizes. So what's the right way to describe the sum?
In SET, what is the maximum number of cards you can deal that might not contain a SET?
What was Fermat’s “Marvelous" Proof?
If Fermat had a little more room in his margin, what proof would he have written there?
In the physical world, objects are made of simpler parts. What are numbers made of?
What Does It Mean to Be a Number? (The Peano Axioms)
Could you explain numbers to someone without using the notion of a number?
What shape do you most associate with a standard analog clock? Circle or... torus?
