I watched these two on Diffie-Hellman Key Exchange too—one again and the other for the first time.
- Public Key Cryptography: Diffie-Hellman Key Exchange (short version)
https://www.youtube.com/watch?v=3QnD2c4Xovk - Secret Key Exchange (Diffie-Hellman) - Computerphile
https://www.youtube.com/watch?v=NmM9HA2MQGI
Mr. Spurgeon
17 April 2019
Addendum:
Lucas Fischer showed me one (the first). YouTube recommended another (the next) and another (the one after that). They're great!