  The Internet of Things (IoT), as a cutting-edge integrated cross-technology,
promises to informationize people's daily lives, while being threatened by
continuous challenges of eavesdropping and tampering. The emerging quantum
cryptography, harnessing the random nature of quantum mechanics, may also
enable unconditionally secure control network, beyond the applications in
secure communications. Here, we present a quantum-enhanced cryptographic remote
control scheme that combines quantum randomness and one-time pad algorithm for
delivering commands remotely. We experimentally demonstrate this on an unmanned
aircraft vehicle (UAV) control system. We precharge quantum random number (QRN)
into controller and controlee before launching UAV, instead of distributing QRN
like standard quantum communication during flight. We statistically verify the
randomness of both quantum keys and the converted ciphertexts to check the
security capability. All commands in the air are found to be completely chaotic
after encryption, and only matched keys on UAV can decipher those commands
precisely. In addition, the controlee does not response to the commands that
are not or incorrectly encrypted, showing the immunity against interference and
decoy. Our work adds true randomness and quantum enhancement into the realm of
secure control algorithm in a straightforward and practical fashion, providing
a promoted solution for the security of artificial intelligence and IoT.
