摘要
提出了在共享数据平台下基于密文的代理安全两方计算协议(ciphertext-based proxy secure two-par-ty computation protocol,CPSTCP),给出该协议的定义、形式化模型.与传统的基于安全计算外包(secure computa-tion outsourcing,SCO)的安全协议相比,本文提出的协议因为不需要秘密共享而拥有更高的安全性和效率.在此基础上,利用基于属性的访问控制策略和已有的安全两方集合交协议,基于格中的困难问题,构造了一个半诚实模型下可证安全的基于密文的代理两方集合交协议.
A ciphertext-based proxy secure two-party computation protocol (CPSTCP) which can be used in shared storage platform is proposed. We presented its conception and define its formal model. Campared with secure protocol based on secure computation outsourcing (SCO), CPSTCP is more secure and efficient because it need not share secret. Using attribute-based access control and secure two-party set intersection computation protocol which has been constructed, we construct a ciphertext-based proxy secure two-party set intersection computation protocol which is secure in the semi-honest model.
出处
《武汉大学学报(理学版)》
CAS
CSCD
北大核心
2012年第6期477-482,共6页
Journal of Wuhan University:Natural Science Edition
基金
国家自然科学基金资助项目(61173164
60973134)
广东省自然科学基金(10351806001000000)
关键词
安全多方计算协议
代理
密文
格
secure multi-party computation
proxy
ciphertext
lattice