Dynamic quantum session key agreement protocol based on d-level mutually unbiased bases

Session keys play an important role in practical communication. In this paper, we propose an efficient dynamic quantum session key agreement protocol based on d-level mutually unbiased bases via multi-party multiplication. In the initial phase, the trusted center detects the identity and number of participants who apply for the construction of session keys by one-to-one correspondence of hash values to avoid any fake attacks. In the encoding phase, all applied participants encrypt their private keys with the system key through location tokens and perform the unitary operation to encode the encryption results on a sequence of mutually unbiased basis quantum states and transmit them in the circle type. The security analysis shows that the proposed scheme is resistant to both external and internal attacks. In this paper, with the help of a predefined system key, the quadratic hash over a finite field is successfully applied to identity authentication for the first time, and allows an arbitrary number of participants to construct a session key dynamically, which is more pervasive compared with other schemes.