一种基于局域不可区分正交直积态的新型量子保密求和协议

A new quantum secure summation protocol based on local indistinguishability orthogonal product states

量子保密求和是量子安全计算的基础,目的是在保护参与者私有信息的前提下求出参与者秘密信息的和。提出了一种新型的量子保密求和协议,即以两体量子系统中的局域不可区分正交直积态作为载体,利用移位操作将秘密编码在正交直积态上,进而完成秘密求和。理论分析表明,本文所提出的协议可以确保正确性,即多个参与者最后可以成功计算出他们秘密的和。同时,协议的安全性可以得到保障,即无论是外部攻击者还是内部参与者都不能获得除自己的秘密与结果之外的任何信息。最后,对协议进行了进一步的分析和讨论,并对可能的研究方向进行了展望。

Quantum secure summation is the basis of quantum secure computation.The purpose is to compute the sum of participants’secrets on the premise of protecting the participants’private information.A new quantum secure summation protocol is proposed,which uses the local indistinguishable orthogonal product states in the bipartite quantum system as the carrier.The shift operations are applied to encode the secret on orthogonal product states to achieve secret summation.Theoretical analysis shows that the proposed protocol can ensure correctness,i.e.,multi-participants can finally successfully calculate the sum of their secrets.At the same time,the security of the protocol can be guaranteed,i.e.,neither external attackers nor internal participants can obtain any information except their own secrets and results.Finally,further analysis and discussion on the agreement are conducted,and possible research directions are looked forward to.