| 基于RlGamal公钥体制的动态（k，n）门限密钥托管方案 |
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| 引用本文： | 谢丽丽,;张龙,;刘绍武,;柯品惠.基于RlGamal公钥体制的动态（k，n）门限密钥托管方案[J].佳木斯工学院学报,2009(1):39-41. |
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| 作者姓名： | 谢丽丽 ;张龙 ;刘绍武 ;柯品惠 |
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| 作者单位： | [1]黑龙江大学数学科学学院,黑龙江哈尔滨150080; [2]绥化学院,黑龙江绥化152061; [3]福建师范大学数学与计算机科学学院,福建福州350007 |
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| 基金项目： | 基金项目：黑龙江省教育厅面上项目（11521209）,黑龙江大学青年科学基金项目（QL200601）. |
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| 摘 要： | 首先对文献3]所提出的门限密钥分割方案进行了整理分析，具体分析了其动态性，然后在此基础上提出了一种新的基于ElGamal公钥体制的动态（k，n）门限密钥托管方案。该方案具有如下特点：（1）可以防止闽下信道攻击；（2）在监听过程中，监听机构可以对托管代理交给其的子密钥进行验证；（3）解决了“一次监听，永久监听问题”；（4）具有动态性质。
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| 关 键 词： | (k n)门限 ElGamal公钥体制 密钥托管 动态性 |
Dynamic Threshold Key Escrow Scheme Based on EIGamal Public Cryptosystem |
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| Affiliation: | XIE Li - li, ZHANG Long, LIU Shao - wu, KE Pin - hui (1. College of Mathematics Science, Heilongjiang University, Harbin 150080, China; 2. Suihua University, Suihua 152061, China; 3. College of Mathematics and Computer Science, Fujian Normal University, Fuzhou 350007, China ) |
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| Abstract: | A threshold secret key sharing scheme given by paper 3] is tidied up and analyzed, its dynamic is discussed, and a new dynamic （ k, n ） threshold scheme based on EIGamal public key cryptosystem is proposed. The scheme has the following properties： it can prevent subliminal attack, monitor department can verify correctness of the secret shadow which was given by escrow agent during monitor procedure, the problem of ＂once monitor, monitor forever＂ is solved, and it is dynamic. |
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| Keywords: | （ k n ）threshold ELGamal cryptosystem key escrow dynamic |
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