计算机工程与应用 ›› 2011, Vol. 47 ›› Issue (32): 98-100.

• 网络、通信、安全 • 上一篇    下一篇

一个新的两重门限代理签密方案

周孟创,余昭平   

  1. 解放军信息工程大学 电子技术学院,郑州 450004
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-11-11 发布日期:2011-11-11

New double-threshold proxy signcryption scheme from bilinear pairings

ZHOU Mengchuang,YU Zhaoping   

  1. Institute of Electronic Technology,the PLA Information Engineering University,Zhengzhou 450004,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-11-11 Published:2011-11-11

摘要: 在签密理论中引入两重门限技术,构造一个新的基于双线性对的两重门限代理签密方案。在该方案中,把第一重(k,n)门限体制应用在密钥共享上,原始签密人把密钥委托给n个秘书来托管,至少k个秘书合作才能恢复此密钥,大大降低了密钥泄露的风险;将第二重(t,m)门限体制应用在代理签密过程中,把签密权委托给m个代签人共享,任何少于t个代理签密者勾结也不能得出正确的签密密文,在很大程度上增强了代理签密的安全性。理论分析表明,说明该方案是可证明安全的,适合实际应用。

关键词: 签密, 秘密共享, 双线性对, 代理签密, 门限方案

Abstract: By applying the concepts of double threshold technology to signcryption theory,a new double-threshold proxy signcryption scheme from bilinear pairings is proposed.In this new scheme,the first(k,n)threshold technology is adopted in the key sharing,the original signcrypter entrusts this key to n secretaries for escrow,at least k secretaries cooperate can recover the key.It greatly reduces the risk of key-compromise.The(t,m)threshold technology is adopted in the process of proxy signcryption,it gives the right of signcryption to entrust m proxy signcrypters sharing,no less than t proxy signcrypters with no right can receive the correct cipher text.To a great extent,it enhances the security.Analysis shows that the scheme is secure,and it is suitable for many applications in practice.

Key words: signcryption, secret sharing, bilinear parings, proxy signcryption, threshold scheme