摘要
研究一种消息恢复型数字签名方案,该方案不需要hash函数和消息冗余就能抵抗伪造攻击。讨论已有的攻击方法和一种能够抵抗这些攻击的改进方案。在保持改进方案安全性的基础上,进行进一步的性能优化。在典型参数设置情况下(p=1024,q=160),优化方案的签名长度仅为原先的44%,计算效率提高了61%,传输效率提高了56%。
This paper investigates a digital signature scheme with message recovery, which is claimed to resist forgery attacks without hash functions and message redundancies. Some attacks and an effective improvement on this scheme are analyzed. A further improvement to shorten the signed signature is presented. The improvement keeps the security properties and makes the scheme more efficient. When ｜p｜ = 1024 and ｜q｜ = 160, the improved length of the signed signature is only 44% of the original, which raises computation efficiency by 61% and communication efficiency by 56 %.
出处
《计算机工程》
CAS
CSCD
北大核心
2008年第9期36-38,共3页
Computer Engineering
基金
国家"863"计划基金资助重大项目(2005AA145110
关键词
数字签名
消息恢复
伪造攻击
digital signature
message recovery
forgery attack
