计算机工程与应用 ›› 2009, Vol. 45 ›› Issue (14): 79-80.DOI: 10.3778/j.issn.1002-8331.2009.14.023

• 网络、通信、安全 • 上一篇    下一篇

椭圆曲线有序多重签名中阈下信道及封闭方法

王建峰,孟 涛,孙圣和   

  1. 哈尔滨工业大学 自动化测试与控制研究所 电气工程及自动化学院,哈尔滨 150080
  • 收稿日期:2008-03-18 修回日期:2008-06-13 出版日期:2009-05-11 发布日期:2009-05-11
  • 通讯作者: 王建峰

Subliminal channel and its close scheme in sequential multi-signature based on elliptic curve cryptosystem

WANG Jian-feng,MENG Tao,SUN Sheng-he   

  1. Department of Automatic Test and Control,Harbin Institute of Technology,Harbin 150080,China
  • Received:2008-03-18 Revised:2008-06-13 Online:2009-05-11 Published:2009-05-11
  • Contact: WANG Jian-feng

摘要: 阈下信道是在正常公开信道的通信模式下所建立的一种传递隐藏信息的秘密信道。以一种基于椭圆曲线密码体制的有序多重签名算法为例,对其中存在的宽带和窄带阈下信道进行了具体分析,并提出一种基于承诺掩蔽的阈下信道封闭方案,并对该方案的安全性和可行性进行了理论分析和探讨。

关键词: 数字签名, 有序多重签名, 椭圆曲线密码体制, 阈下信道

Abstract: The subliminal channel is a covert communication channel constructed in public correspondence pattern.In this paper,the subliminal channel in an existing sequential multi-signature algorithm based on elliptic curve cryptosystem is analyzed.And the wideband and narrowband subliminal channel in the digital multi-signature is discussed on the presence and capacity.A scheme for closing the subliminal channel in the digital multi-signature is given,which is based on commitment-and-cover method.The security and feasibility of this scheme is analyzed and discussed.

Key words: digital signature, sequential multi-signature, elliptic curve cryptosystem, subliminal channel