摘要： 为了在多代理签名中实现既认证又保密，提出了第1个基于双线性配对的 带门限共享解密的多代理签密方案，分析了其安全性，结果表明该方案是正确的、安全的。在该方案中，一个原始签密人可以指定一群人作为他的代理签密群，只有当代理签密群中所有成员一起合作才能代替原始签密人进行签密。在 个接收者中，任何 个或多于 个接收者可以合作解密消息，但是任何 个或者更少的接收者则不能合作解密消息。
关键词:
双线性配对,
多代理签密,
门限共享解密
Abstract: In order to provide incentive to cooperate with authentication and confidentiality in multi-proxy signature scheme, a new multi-proxy signcryption scheme from pairings, with (t,n) threshold shared unsigncryption, is proposed and its security is analyzed, which indicates that this scheme is correct and secure. In this scheme, an original signcrypter could authorize a proxy group as its proxy agent. Then only the cooperation of all the signcrypters in the proxy group can generate the proxy signcryption on behalf of the original signcrypter. In the scheme, any t or more of n receivers can unsigncrypt the message and any t-1 or fewer receivers can not unsigncrypt the message.
Key words:
Bilinear pairings,
Multi-proxy signcryption,
Threshold shared unsigncryption
刘俊宝;肖国镇. 带门限共享解密的多代理签密方案[J]. 计算机工程, 2006, 32(23): 21-23.
LIU Junbao; XIAO Guozhen. Multi-proxy Signcryption Scheme with Threshold Shared Unsigncryption[J]. Computer Engineering, 2006, 32(23): 21-23.