牛顿信道的带宽研究  

Research on the Bandwidth of Newton Channel

作　　者：董庆宽[1] 白恩健[1] 肖国镇[1] 

机构地区：[1]西安电子科技大学ISN综合业务网国家重点实验室,西安710071

出　　处：《计算机学报》2004年第6期849-853,共5页Chinese Journal of Computers

基　　金：国家自然科学基金重大项目 ( 90 10 40 0 5 );国家"九七三"重点基础研究发展规划项目基金 (G19990 3 5 80 4)资助

摘　　要：Anderson于 1996年研究发现了ELGamal签名中的一类结合宽带和窄带信道优点的阈下信道 ,称为牛顿信道 .该文在考虑签名安全性的前提下深入研究了牛顿信道的带宽 ,主要是签名作用子群与牛顿信道带宽的关系 .文章的后面给出了DSA中一个带宽不太大 ,实用性强 ,计算复杂度小的牛顿信道设计方案 .Anderson discovered a new subliminal channel in ElGamal signature, called Newton channel in 1996. The channel has a large bandwidth and does not require the sender to compromise the security of her signing key. In this paper, considering the signature's security, the bandwidth of Newton channel is deeply researched with the emphasis on the relation between the subgroup of generating signature and the bandwidth of Newton channel. Finally a Newton channel scheme in DSA is given. Its bandwidth is not very large, but it has a good practicability and a low computational complexity.

关 键 词：阈下信道 牛顿信道 信道带宽 签名安全性 ELGAMAL签名 DSA 

分 类 号：TN911[电子电信—通信与信息系统] TN918[电子电信—信息与通信工程]