半量子密码学中若干关键问题研究

项目名称： 半量子密码学中若干关键问题研究

项目编号： No.61202448

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 计算机科学学科

项目作者： 朱珍超

作者单位： 东南大学

项目金额： 25万元

中文摘要： 本项目旨在对半量子密码学发展中存在的几个关键问题进行研究。结合半量子密码协议研究中存在的问题，我们将重点开展以下四方面的研究：1）通过全面分析总结现有量子密码协议中所采用的基本量子操控手段，归纳出适宜于只具有经典计算能力的经典方的操控手段集合，以解决现有情况下因为合理的经典方模型的缺失而引发的问题；2）通过改变已有半量子密码协议设计方式，特别是检测窃听模式，以解决半量子密码协议中普遍存在的量子比特利用率低下的问题；3）针对现有半量子秘密共享协议均是基于纠缠态设计的问题，给出基于单粒子的半量子秘密共享协议；4）针对现有半量子安全直接通信协议只能实现从经典方到量子方传输信息的问题，设计出可以实现从量子方到经典方传输信息的半量子安全直接通信协议。 通过上述问题的研究与解决，我们将构造出更为完整的半量子密码学理论框架。

中文关键词： 量子秘密共享；受控非门；量子安全直接通信；量子密钥协商；参与者攻击

英文摘要： This project aims to solve several key problems in the existing semi-quantum cryptography. We focus our research on the following four aspects: 1) Through the comprehensive analyzing and summarizing of the basic quantum manipulation used in the existing quantum cryptographic protocols, we summarized an appropriate set which includes all the manipulation classical participants can use. 2) Through changing the existing design approach, especially the eavesdrop checking mode, we improve the efficiency of the quantum bits in the semi-quantum cryptographic protocols. 3) For the problems that the existing semi-quantum secret sharing protocol are all designed based on entanglement, we will propose several semi-quantum secret sharing protocols based on single particle. 4) For the problems that information can only be transmitted from the classical party to the quantum party in the existing semi-quantum secure direct communication protocol, we will propose several semi-quantum secure direct communication protocols in which the information can be transmitted from the quantum party to the classical party. Through studying and solving the above problems, we will construct a more complete theoretical framework of the semi-quantum cryptography.

英文关键词： Quantum secret sharing；Controlled not gate；secure direct communication；quantum key agreement；Participant attack