| 基于概论图灵机的无阈下信道的密码系统定义 |
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| 引用本文： | 董庆宽,李小平.基于概论图灵机的无阈下信道的密码系统定义[J].信息安全与通信保密,2009(8):320-322. |
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| 作者姓名： | 董庆宽 李小平 |
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| 作者单位： | 1. 西安电子科技大学,综合业务网国家重点实验室,陕西,西安,710071
2. 西安电子科技大学,机电工程学院,陕西,西安,710071 |
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| 基金项目： | The Subject of State Key Lab of Modern Comnunications，The National Natural Science Foundation of China，The Subject of State Key Laboratory of Information Security (Graduate School of Chinese Academy of Sciences) |
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| 摘 要： | 文中通过对具有无阈下信道密码系统定义的研究，指出阻止闽下信道使用的唯一方式是修改密码系统使其具有无阈下性，而且一个参与密码系统运行的主动看守是不可或缺的。在分析了Burmester—Desmedt定义缺点的基础上，基于概论图灵机模型给出了一个新的定义，最后简要讨论了具有无阈下信道密码系统的实现代价。
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| 关 键 词： | 密码学 具有无阂下性的密码系统 概论图灵机 |
Definition of Subliminal-Free Cryptosystems Based on Probabilistic Turing Machine Model |
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| DONG Qing-kuan,LI Xiao-ping.Definition of Subliminal-Free Cryptosystems Based on Probabilistic Turing Machine Model[J].China Information Security,2009(8):320-322. |
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| Authors: | DONG Qing-kuan LI Xiao-ping |
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| Affiliation: | DONG Qing-kuan, LI Xiao-ping (a. State Key Lab. of Integrated Services Networks; b. School of Meno electronic Engineering, Xidian University, Xi＇ an Shaanxi 710071, China) |
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| Abstract: | The research on the definition of subliminal-free cryptosystems shows that the only way to prevent the use of subliminal channels is to modify the cryptosystems and to make them subliminal-free,and an active warden involved in the running of cryptosystems is indispensable.In this paper,the weakness of Burmester-Desmedt' s definition is analyzed,and then a new definition of subliminal-free cryptosystems based on a probabilistic Turing machine model is given.Finally,the cost of designing a complete subliminal- free cryptosystem is discussed. |
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| Keywords: | cryptography subliminal-free cryptosystems probabilistic turing machine |
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