A Key Exchange Protocol is a method used to securely share cryptographic keys between parties. This is essential for enabling encrypted communication over insecure channels. In this process, two participants generate a shared secret key that only they know, which can be used to encrypt and decrypt messages. The protocol ensures that even if an outsider intercepts the exchanged information, they cannot derive the shared secret.One of the most well-known protocols is Diffie-Hellman. It allows two parties to create a shared key without directly transmitting it. Instead, they exchange public keys and each performs calculations using their private key. The result is a shared secret that is secure from eavesdroppers.Key exchange protocols are crucial in securing transactions and communications. They help maintain privacy and integrity by ensuring that only authorized parties can access sensitive information. Proper implementation of these protocols is vital for the overall security of systems relying on encrypted communication.