【作者】 张键红； 孙志宾； 邹维；

【Author】 Zhang Jianhong~1,Sun Zhibin~1,and Zou Wei~2 1(College of Sciences,North China University of Technology,Beijing 100144) 2(Institute of Computer Science & Technology,Peking University,Beijing 100187)

【机构】 北方工业大学理学院； 北京大学计算机科学技术研究所；

【摘要】 阈下信道是一种在公开信道中所建立的实现隐蔽通信的信道,它是一种典型的信息隐藏技术.通过结合数字签名和阈下信道技术,提出了一种基于双线性对的具有阈下信道的数字签名方案,并且在随机预言模型下证明该方案是安全的,其安全性是基于求解有限域上离散对数的困难性.该方案的一个主要特点是:同一个签名算法能够产生普通数字签名和具有阈下信道的数字签名,在正常情况下,签名者可以进行一般数字签名,如果需要阈下信道通信,签名者能够产生带有阈下信道的数字签名,非常方便签名者对阈下信道签名的灵活使用.更多还原

【Abstract】 Subliminal channel is a covert channel,and can realize privacy communication in the public channel.It is a classical information hiding technology.In this paper,by combining digital signature and subliminal channel,a pairing-based digital signature with subliminal channel is proposed,and the scheme is proved to be secure in the random oracle model.The security of the scheme is based on the difficulty of solving the discrete logarithm problem.In the proposed scheme,an outstanding character is that the same algorithm can produce the ordinary signature and the digital signature with subliminal channel.Usually,the signer can produce an ordinary signature,if necessary,the signer can produce a digital signature with subliminal channel.It is very convenient to use digital signature with subliminal channel for the signer.更多还原