<p>The Diffie-Hellman key exchange secures everything from your text messages to government secrets</p>
The Diffie-Hellman key exchange is a method used to securely share cryptographic keys over a public channel. It allows two parties to establish a shared secret key that can be used for encrypted communication without needing to exchange the key itself.
Public key cryptography is a cryptographic system that uses pairs of keys: a public key, which can be shared openly, and a private key, which is kept secret. This system enables secure data transmission and authentication, as only the holder of the private key can decrypt messages encrypted with the corresponding public key.