代理签名与阈下信道的封闭

Proxy Signature and Subliminal－Free Signature Schemes

1983年,Simmons1提出了阈下信道的概念,并阐述了如何在一个可认证的消息中隐藏一个秘密信息.1985年和1994年,Simmons分别描述了如何利用ElGamal签名方案和 DSS建立阈下信道并指出了阈下信道的若干应用2－3,1998年和2000年笔者分别在文献4和文献5中共建立了六个封闭阈下信道的签名方案.文章将基于代理多重签名和一次性代理签名又建立了两个封闭阈下信道的新型签名方案.

Simmons introduced the notion of subliminal channel in 1983,by demons how to hide the secret information inside a authenticated message.In 1985 and 1994,Simmons showed how to embed a subliminal channel in digital signatures created using the ElGamal signature scheme and DSS.Six signature schemes on sealing subliminal channels are proposed by paper 4 and 5．This paper proposes two new subliminal－free signature schemes by using proxy multisignature and one－time proxy signature．