Three-Party Quantum Key Injection Scheme with W States

A three-party quantum key injection scheme based on quantum entanglement correlation and local operation of W states is proposed, and a detailed security analysis is provided. As a complete method of entanglement channel key injection, this scheme encodes the key information in W state, which travels more stably in a quantum channel. The measurement result can be modified with a correction scheme or the Mod-2 operation after measuring the particles in quantum registers with Z basis, so that the two receivers will obtain the same key. This scheme is based on the entanglement correlation of the state to carry out the security detection of the key, so the key injector cannot obtain any information about the key, which is of great significance in the field of key management.