Abstract:

Recently, multi-party quantum private comparison(MQPC) has attracted more and more attentions and has made considerable theoretical progress. Its main purpose is how to let the n participants judge whether their secrets are equal or not under the guarantee of the basic principles of quantum mechanics. In the research of MQPC, two basic designing models named Circle-model and Tree-model are presented in this paper. Two specific MQPC protocols with n-level single photon and n-dimensional n-particle GHZ states are proposed. From our analysis, it can be seen that the above protocols could be implemented by the existing single particle measurement technology and resist against outside attack and participant attack(the semi-honest third party attack). It can be concluded that correctness, fairness, security and higher efficiency can be guaranteed in proposed protocols.

Key words: multi-party quantum private comparison, participant attack, outside attack, semi-honest third party