Quantum Key Distribution (QKD) is a method used to securely share encryption keys between two parties. It leverages the principles of quantum mechanics, ensuring that any attempt to eavesdrop on the key exchange will be detectable, thus providing a high level of security. In QKD, photons are often used to transmit information. The unique properties of quantum states allow the sender and receiver to create a shared secret key that is theoretically immune to interception. This technology is crucial for enhancing cybersecurity in various applications, including banking and government communications.