Imagine sending a sealed letter across a crowded city where anyone might intercept it. The seal on the envelope keeps the contents private, the signature on the letter proves the sender is who they claim to be, and reusing the same secure channel later without starting from scratch keeps things efficient. That’s roughly how the internet’s main security protocol works every time you open a banking site, send a message, or load an app. The protocol, known as Transport Layer Security (TLS), creates
