通信学报 ›› 2007, Vol. 28 ›› Issue (7): 28-34.doi: 1000-436X(2007)07-0028-07

• 学术论文 • 上一篇    下一篇

基于VSPH的UC不经意传输协议

李凤华1,2,冯涛1,马建峰1   

  1. 1 西安电子科技大学 计算机网络与信息安全教育部重点实验室,陕西 西安710071
    2 北京电子科技学院,北京 100070
  • 出版日期:2007-07-25 发布日期:2017-06-22
  • 基金资助:
    国家自然科学基金资助项目;国家自然科学基金资助项目;国家自然科学基金资助项目

Universally composable oblivious transfer protocol based on VSPH

Feng-hua LI1,2,Tao FENG1,Jian-feng MA1   

  1. 1 Ministry of Education Key Laboratory of Computer Networks and Information Security,Xidian University,Xi’an 710071,China
    2 Beijing Electronic Science and Technology Institute,Beijing 100070,China
  • Online:2007-07-25 Published:2017-06-22
  • Supported by:
    The National Natural Science Foundation of China;The National Natural Science Foundation of China;The National Natural Science Foundation of China

摘要:

基于UC(universally composable)安全模型框架,提出了一个新的不经意传输协议方案(UC-OT)。利用可验证平滑投影散列函数(VSPH),在公共参考串模型中,该协议方案实现了抗自适应攻击的通用可组合安全。UC-OT利用基于确定性组合剩余假设构造的非承诺加密体制提高了协议的计算效率,实现了string-OT,与bit-OT协议相比单轮通信效率提高O(n)倍。在non-erase模型假设下,与Canetti所提的方案相比,单轮交互次数减少1次;与Fischlin方案相比,单轮交互次数减少2次,并且本方案不需要辅助第3方,因而更符合实际情况。

关键词: 信息安全, 不经意传输, 通用可组合, 自适应攻击

Abstract:

A new oblivious transfer protocol was proposed within the framework of universally composable security(UC-DT).The protocol based on the verifiably smooth projective hashing(VSPH) is against adaptive adversaries in a common reference string (CRS) model.The UC-OT protocol improves computational efficiency with non-committing encryptions(NCE)which is based on decisional compounding residuosity,achieves UC-OT,and it saves O(n)-1 rounds in communication efficiency than bit-OT protocols.Compared with Canetti’s scheme in non-erase model,the message reduced once.Compared with Fischlin’s scheme,the message transfers were reduced twice,and the scheme does not rely on the auxiliary party,therefore it is more practical.

Key words: information security, oblivious transfer, universally composable, self-adaptive adversaries

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