Definition[]
Quantum cryptography (also called quantum key distribution (QKD)) is
| “ | [a] technique for encoding and sending data along unsecured public fiber optic lines that exploits the fact that small particles of matter (e.g., photons) are both intertwined and yet completely isolated. Any attempt by an outside party to analyze the (intercepted) coded material changes the atoms' characteristics, rendering the transmission useless.[1] | ” |