| A FRAMEWORK FOR REAL-VALUED CIPHER SYSTEMS |
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| 作者姓名： | Zhaozhi ZHANG Nan JIANG |
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| 作者单位： | [1]Institute of Systems Science, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100080, China [2]College of Computer Science and Technology, Beijing University of Technology, Beijing 100022, China |
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| 基金项目： | The research is supported by the National Natural Science Foundation of China under Grant No. 90304012 and No. 10331030. |
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| 摘 要： |
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| 关 键 词： | 计算机复杂理论 数字功能 真实价值系统 计算机技术 |
| 收稿时间： | 2006-07-25 |
A Framework for Real-Valued Cipher Systems |
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| Zhaozhi ZHANG Nan JIANG.A FRAMEWORK FOR REAL-VALUED CIPHER SYSTEMS[J].Journal of Systems Science and Complexity,2007,20(4):486-491. |
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| Authors: | Zhaozhi Zhang Nan Jiang |
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| Institution: | (1) Institute of Systems Science, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing, 100080, China;(2) College of Computer Science and Technology, Beijing University of Technology, Beijing, 100022, China |
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| Abstract: | Most cipher systems designed thus far are binary-valued or integer-valued cipher systems. Their security relies on the assumption that one-way functions exist. Though the existence of one-way functions has not been proved yet, most cryptographic researchers believe that one-way functions exist. In addition, many candidates for one-way functions have been proposed. Therefore, the key step for developing real-valued cipher systems is to define real one-way functions and to propose candidates for them. In this paper, based on computational complexity theory over the real field, we give two definitions of real one-way functions; one is for digital one-way functions and the other is for general one-way functions. Candidates for these two classes of one-way functions are also proposed. Moreover, we present two examples to demonstrate that the candidates for both digital one-way functions and general one-way functions can be applied to construct secure real-valued cipher systems. |
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| Keywords: | Computational complexity theory digital one-way function general one-way function real-valued cipher system |
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