| Information-Theoretic Analysis for the Difficulty of Extracting Hidden Information |
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| 引用本文： | ZHANGWei-ming LIShi-qu CAOJia LIUJiu-fen. Information-Theoretic Analysis for the Difficulty of Extracting Hidden Information[J]. 武汉大学学报:自然科学英文版, 2005, 10(1): 315-318. DOI: 10.1007/BF02828677 |
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| 作者姓名： | ZHANGWei-ming LIShi-qu CAOJia LIUJiu-fen |
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| 作者单位： | [1]／／StateKeyLaboratoryofInformationSecurity,（GraduateSchooloftheChineseAcademySciences）,Beijing100039,China [2]DepartmentofInformationResearch,InformationEngineeringUniversity,Zhengzhou450002,Henan,China |
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| 基金项目： | SupportedbytheNationalNaturalScienceFundationofChina(60172067,60133020) |
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| 摘 要： | The difficulty of extracting hidden information, which is essentially a kind of secrecy, is analyzed by information-theoretic method, The relations between key rate, message rate, hiding capacity and difficulty of extraction are studied in the terms of unicity distance of stego-key, and the theoretic conclusion is used to analyze the actual extracting attack on Least Significant Bit(LSB) steganographic algorithms.
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| 关 键 词： | 信息隐藏 信息提取 隐写术 一城市范围 信息安全 |
| 收稿时间： | 2004-05-30 |
Information-theoretic analysis for the difficulty of extracting hidden information |
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| Zhang Wei-ming,Li Shi-qu. Information-theoretic analysis for the difficulty of extracting hidden information[J]. Wuhan University Journal of Natural Sciences, 2005, 10(1): 315-318. DOI: 10.1007/BF02828677 |
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| Authors: | Zhang Wei-ming Li Shi-qu |
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| Affiliation: | Graduate School of the Chinese Academy Sciences |
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| Abstract: | The difficulty of extracting hidden information, which is essentially a kind of secrecy, is analyzed by information-theoretic method. The relations between key rate, message rate, hiding capacity and difficulty of extraction are studied in the terms of unicity distance of stego-key, and the theoretic conclusion is used to analyze the actual extracting attack on Least Significant Bit(LSB) steganographic algorithms. |
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| Keywords: | information hiding steganography extracting attack difficulty of extraction unicity distance |
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