摘要
在以往的(t,n)秘密共享模式中,为了使接收者能够重构消息,n个验证者之间需要广播消息密文影子(shadow).本文提出了一种新的(t,n)秘密共享模式,在该模式中,验证者之间无需广播秘密影子,从而大大地减少了网络的通信量,提高了安全性.此外,该模式具有密钥和消息认证功能,不仅能够有效地抵抗假冒攻击,还能够识别验证者的欺骗行为.
In existing encryption schemes with (t,n) secret shared control, n verifiers have to broadcast the shadows of message to each other in order to reconstruct the message. A new (t, n) secret sharing scheme is proposed, in which the verifiers don't need to broadcast the shadows of message to each other. Thus, this scheme can achieve higher security and reduce the traffic of network. Besides, the scheme provides the function of key and message au- thentication. It can not only prevent forging attacks, but also find the active cheating of any verifier.
出处
《浙江大学学报(理学版)》
CAS
CSCD
北大核心
2007年第6期633-635,701,共4页
Journal of Zhejiang University(Science Edition)
基金
国家自然科学基金资助项目(10271040)
安徽省自然科学基金资助项目(00043115)
关键词
秘密共享
公钥认证
离散对数
门限
secret sharing
public key authentication
discrete logarithm
threshold