A Quantum Protocol for (t,n)-Threshold Identity Authentication Based on Greenberger-Horne-Zeilinger States

摘要

A quantum protocol for (t,n)-threshold identity authentication based on Greenberger-Horne-Zeilinger states is presented. A trusted third party (TTP) can authenticate the users simultaneously when and only when t or more users among n apply for authentication. Compared with the previous multiparty simultaneous quantum identity authentication (MSQIA) protocols, the proposed scheme is more flexible and suitable for practical applications.