有序多重签名体制中阈下信道通信方法的研究

本文分析了阈下信道技术在数字签名中的应用，并以一种有序多重数字签名方案为例，对其中存在的宽带和窄带阈下信道进行了具体分析．提出了一种有序多重签名体制下的窄带阈下信道通信方案，通过实时性测试确定阈下信息位数，从而满足了传输信息容量与实时性的要求。

Covert Communication Based on Subliminal Channel in Ordinal Digital Multi-signature

The subliminal channel is a covert communication channel constructed in public correspondence pattern. As a kind of the modem information hiding technology, it is used to transmit the secret information. The subliminal channel in general Elgamal signature is analyzed. And the wideband and narrowband subliminal channel in the ordinal digital multi-signature is discussed. A scheme of narrowband subliminal channel in the ordinal digital multi-signature is given and the bit rate of the sent message is confirmed by a real-time test so that the capacity and real-time request of the narrowband subliminal channel can be satisfied.