| Tracing Precept against Self-Protective Tortious Decoder |
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| 作者姓名： | Jie Tian Xin-Fang Zhang Yi-Lin Song Wei Xiang |
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| 作者单位： | [1]Institute of Information Sciences and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China [2]Institute of Computing Technology, Chinese Academy of Siences, Beijing, 100080, China [3]Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China |
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| 基金项目： | This work was supported by the Large-Scale Security SoC Project of Wuhan Science and Technology Bureau of China under Grand No. 20061005119. |
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| 摘 要： | Traceability precept is a broadcast encryption technique that content suppliers can trace malicious authorized users who leak the decryption key to an unauthorized user. To protect the data from eavesdropping, the content supplier encrypts the data and broadcast the cryptograph that only its subscribers can decrypt. However, a traitor may clone his decoder and sell the pirate decoders for profits. The traitor can modify the private key and the decryption program inside the pirate decoder to avoid divulging his identity. Furthermore, some traitors may fabricate a new legal private key together that cannot be traced to the creators. So in this paper, a renewed precept is proposed to achieve both revocation at a different level of capacity in each distribution and black-box tracing against self-protective pirate decoders. The rigorous mathematical deduction shows that our algorithm possess security property.
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| 关 键 词： | 自我保护 解码器 预防攻击 编密码 署名用户 追踪规则 |
| 修稿时间： | 2006-04-062006-05-08 |
Tracing Precept against Self-Protective Tortious Decoder |
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| Jie Tian Xin-Fang Zhang Yi-Lin Song Wei Xiang.Tracing Precept against Self-Protective Tortious Decoder[J].Journal of Electronic Science Technology of China,2007,5(2):115-119. |
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| Authors: | Jie Tian Xin-Fang Zhang Yi-Lin Song Wei Xiang |
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| Abstract: | Traceability precept is a broadcast encryption technique that content suppliers can trace malicious authorized users who leak the decryption key to an unauthorized user. To protect the data from eavesdropping, the content supplier encrypts the data and broadcast the cryptograph that only its subscribers can decrypt. However, a traitor may clone his decoder and sell the pirate decoders for profits. The traitor can modify the private key and the decryption program inside the pirate decoder to avoid divulging his identity. Furthermore, some traitors may fabricate a new legal private key together that cannot be traced to the creators. So in this paper, a renewed precept is proposed to achieve both revocation at a different level of capacity in each distribution and black-box tracing against self-protective pirate decoders. The rigorous mathematical deduction shows that our algorithm possess security property. |
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| Keywords: | Attack prevention broadcast encryption Diffie-Hellman problem malicious subscriber tracing algorithm |
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