On April 24, 2017, Huawei has applied for a new patent related to the quantum key. According to the enterprise search app, the patent is registered as a quantum key distribution system, method, and device, which is publically announced today with publication number CN108737083B.
The patent information shows that the quantum key distribution helps in reducing the complexity and cost of quantum key distribution. It is a secure communication method that enables two parties to produce a shared random secret key known only to them, which can then be used to encrypt and decrypt messages.
The quantum key distribution system consists of two communications devices, a third-party system, and two measurement devices.
The first measuring device is configured to generate the first response report by analyzing the receiving position and time of the first photon sent by the first communication device and the receiving position and receiving time of the third photon sent by the third-party system satisfy the preset pattern.
The second measuring device does the same as the first one but it generates a report of the second communication device and third party system.
The first and second communication device after receiving the first and second response recognizes the bit value and saved that bit value as a shared quantum key.
What is Quantum Key:
Quantum key distribution is a secure communication method that implements a cryptographic protocol involving components of quantum mechanics. It enables two parties to produce a shared random secret key known only to them, which can then be used to encrypt and decrypt messages.