Tutorial by Prof Chris Bishop: how encryption keys work. Key exchange.

Excellent tutorial by Prof Chris Bishop: how encryption keys work. Key exchange.

Bishop is a brilliant man. I know because a quarter of a century ago I read his textbook that was the seed for ChatGPT and Artificial Intelligence as we know it in April 2024.

This is a very simple and elegant lecture on Key Exchange, the foundation of cryptographic systems, that even a teenager can understand.

This clip from the 2008 Royal Institution Christmas Lectures shows a simple demonstration of how two people can agree on a secret key, even though all of their communications are carried out in public. In the electronic world, secret key exchange allows computers to communicate securely, and is used, for example, when you give your credit card information to an on-line shop.

Link to original: https://www.youtube.com/watch?v=U62S8SchxX4