  With the rapid development of quantum computers the currently secure
cryptographic protocols may not stay that way. Quantum mechanics provides means
to create an inherently secure communication channel that is protected by the
laws of physics and not by the computational hardness of certain mathematical
problems. This paper is a non-technical overview of quantum key distribution,
one of the most well-known application of quantum cryptography, a type of
cryptography poised to exploit the laws of quantum mechanics directly.
