数据伪装技术支撑的安全多方计算研究

Data Disguising Techniques Research of Secure Multi-Party Computation

对于多方安全计算目前国内外已有许多研究成果,从安全方面去看很多解法是尽善尽美,但在实际的运行中却不尽人意.为了开发实用的安全多方计算解法,研究了支撑可调节安全等级的安全多方计算的多种数据伪装技术.包括线性变换伪装、(Z+V)伪装和多项式函数伪装.设计了各种数据伪装的详细协议,并对其安全性与复杂性进行了分析.最终得出各种数据伪装技术是可以在有效性和安全性之间进行调节的,即用户可在性能和安全性之间权衡两者的轻重程度,然后作出抉择,选择适合于实际情况的安全级别.

At present,there are many research about secure multi-party computation In China and abroad.As for security aspect In China and abroad,many solutions are ideal, but not good at real life impelmentation.Aiming at developing practical solutions to secure multi-party computation,developed some data disguising techniques of secure multi-party computation of adjustable the security level,including linear transformation disguise、（Z ＋ V）-disguise and polynomial function disguise.In addition,protocols of several data disguising techniques designed and their security and Complexity analysis discussed.Data disguising techniques given are adjustable towards either more efficient or more secure,namely users can decide the degree of tradeoff between the performance and the security.