Demystifying Key Exchange: From Classical ECDHE to a Post-Quantum Future

In the digital world, the secure exchange of cryptographic keys is the foundation upon which all private communication is built. It’s the initial, critical handshake that allows two parties, like a user’s browser and a web server, to establish a shared secret and communicate securely over the untrusted expanse of the internet.As the quantum computing era approaches, the very mathematics underpinni