实用化量子安全多方计算协议理论研究

Secure multiparty computation is an important research content of modern cryptography. Along with the informatization and networking of the way people live and work, secure multiparty computations are playing an increasingly important role in various tasks of protecting the information security. This project aims to study some important directions in the theory of quantum secure multiparty computation, explore how to apply the technologies and methods, which are current popular in the study of quantum cryptography, to the research of quantum secure multiparty computation, and solve several key issues encountered in the process of practicality. The main research contents of this project includes: to study how to improve the efficiency, robustness and the realizability of the current quantum secure multiparty computation protocols; to propose quantum secure multiparty computation protocols with measurement-device-independent method; to propose quantum secure multiparty computation protocols based continuous variables; to analyze the security of the existing quantum secure multiparty computation protocols, explore the potential vulnerabilities and put forward some possible countermeasures or improvement strategies. The results of this project, on the one hand, will help to explore and develop the potential applications of hot quantum information technologies in the research of quantum secure multiparty computation problems, improve the related theory of quantum secure multiparty computation and promote the balanced development of its different branches; on the other hand, will provide theoretical supports for its possible implementation in the future.

安全多方计算是现代密码学中的重要研究内容。随着人类生活及工作方式的不断信息化与网络化，安全多方计算在保护信息安全的各项任务中发挥着日益重要的作用。本项目主要研究当前量子安全多方计算协议理论中的几个重要方向，探索如何将现阶段量子密码研究中的热点技术及方法应用于量子安全多方计算理论研究中，解决实用化过程中必须面对的几个关键问题，包括：研究如何提高现有量子安全多方计算协议的效率、鲁棒性及可实现性；研究如何利用测量设备无关方法设计量子安全多方计算协议；研究如何基于连续变量设计量子安全多方计算协议；对现有量子安全多方计算协议的安全性进行分析，探索潜在的安全漏洞，尝试给出相应的对抗方法或改进策略。本项目的研究成果一方面有助于探索和开发量子密码研究中的一些热点技术及方法在安全多方计算问题研究中的应用潜力，完善量子安全多方计算协议理论，促进其不同分支的平衡发展；另一方面也将为今后的实际应用提供理论支持。

本项目开展量子安全多方计算理论研究，深入探索了如何提升量子安全多方计算协议的效率、鲁棒性及可实现性，设计/提出了多个相关方法或协议。在上述研究内容基础之上，依据国内外学术发展动态，深入开展了量子安全多方计算基础协议理论研究，在量子真随机数产生、量子密钥分发/协商等密切相关的研究内容上进行了拓展研究。在上述研究过程中，总计发表SCI检索论文24篇（多数发表于《Optics Letters》、《Physical Review A》、《Optics Express》、《New Journal of Physics》等国际知名学术期刊），EI检索论文2篇，录用SCI检索论文1篇，申请发明专利9项，授权发明专利4项、软件著作权1项。综上，达到了预期的研究目标。