Trust evaluation model immune to decoherent noise in quantum communication network

Trust evaluation between communicating nodes is a critical requirement for establishing secure and reliable communication links in quantum communication networks. However, existing research on quantum trust evaluation has not considered the impact of noise in the communication environment. In particular, decoherence causes noise that can disrupt the transmission process of trust factors. To address this issue, this paper proposes a quantum trust evaluation model that is immune to decoherent noise by using particles in a decoherence free state. Only a six-particle decoherence free state needs to be prepared, while the remaining particles can be obtained by quantum bit-swapping operations. The security analysis shows that this model exhibits resistance to both internal and external attacks, in addition to better privacy performance and higher particle utilization.