Mutual Weak Quantum Users Key Agreement Protocol Based on Semi-Honest Quantum Server

Key agreement is an important research direction of key management. Different from the key distribution protocol, the key agreement protocol not only needs to ensure the security of the key, but also needs to ensure the fairness between participants. This paper proposed a high-dimensional quantum key agreement protocol by using single-particle states based on quantum Fourier transform, which enables two users with weak quantum ability to negotiate a session key equally with the help of semi-honest quantum server TP. In the protocol, the weak quantum participants do not need to have the ability to measure and store quantum. They only need to be able to perform reflection and unitary operation to complete the key agreement. The main quantum operations are completed by TP, and Alice and Bob can use TP through leasing. Security analysis proves that the proposed protocol can resist both the outside attack and participant attack. Compared with the related semi-quantum key agreement protocol, this protocol has lower resource, higher efficiency and security, which is more suitable for practical application scenarios.