In this video, Sabine Hossenfelder explains how public key cryptography works on the internet today, using RSA as example, what the risk is that quantum computers pose for internet security, what post-quantum cryptography is, how quantum key distribution works, and what quantum cryptography is.

Video contents:

- 0:00 Intro
- 0:31 Public Key Cryptography
- 2:43 Risk posed by Quantum Computers
- 4:03 Post Quantum Cryptography
- 5:31 Quantum Key Distribution
- 10:25 Quantum Cryptography and Summary
- 11:16 NordVPN Sponsor Message
- 12:28 Thanks