An interesting article about encryption.

Everything you wanted to know about SSL/TLS/PKI (But were too busy to ask)
https://flightaware.engineering/everything-you-wanted-to-know-about-ssl-tls-pki-but-were-too-busy-to-ask/
Encryption is all around us. But how do these technologies work? Keep reading my dear reader, and you will uncover the deep mysteries and arcane knowledge of critical components of our online (and offline!) internet infrastructure.