摘要
针对电子政务数据交换的安全问题,基于离散对数设计一个双陷门哈希函数,并证明新函数满足有效性、陷门碰撞、抗碰撞和抗密钥泄露等性质。结合该陷门哈希函数和代理重签名方案,提出一种新的电子政务数据安全交换方案,并证明新方案的安全性可归约到所基于的代理重签名方案和陷门哈希函数的安全性。分析结果表明,新方案的重签名生成和验证开销小,数据交换实时性高,存储空间小,适用于计算资源有限的设备。
Considering the security problem of e-government data exchange,a double trapdoor Hash function is proposed by using discrete logarithm assumption.Moreover,this function is proved to satisfy the properties,such as validity,trapdoor collision,collision resistance,key compromise resistance and so on.Combining the proposed Hash function with existing proxy re-signature schemes,a new secure e-government data exchange scheme is presented,and the security of this scheme can be reduced to the security of the trapdoor Hash function and the underlying proxy re-signature scheme.Analysis results show that the proposed scheme can effectively reduce the cost of re-signature generation and resignature verification,enhance real-time data exchange,and reduce storage space.Therefore,the proposed scheme is suitable for devices with limited computing resources.
出处
《计算机工程》
CAS
CSCD
北大核心
2017年第2期183-188,共6页
Computer Engineering
基金
国家自然科学基金(61662069
61262057)
甘肃省科技计划项目(145RJDA325)
国家档案局科技计划项目(2014-X-33)
甘肃省高等学校科研项目(2014-A011)
兰州市科技计划项目(2013-4-22)
西北师范大学青年教师科研能力提升计划项目(NWNU-LKQN-14-7)
关键词
电子政务
数据交换
双陷门哈希函数
代理重签名
离散对数
e-government
data exchange
double trapdoor Hash function
proxy re-signature
discrete logarithm
