| Chameleon Hashes Without Key Exposure Based on Factoring |
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| 作者姓名： | Wei Gao Xue-Li Wang and Dong-Qing Xie |
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| 作者单位： | [1]School of Mathematics and Econometrics, Hunan University, Changsha 410082, China [2]School of Mathematics Science, South China Normal University, Guangzhou 510631, China [3]School of Computer and Communication, Hunan University, Changsha 410082, China |
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| 基金项目： | This work is partially supported by the National Natural Science Foundation of China under Grants No. 10271042 and No. 60373085. |
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| 摘 要： | Chameleon hash is the main primitive to construct a chameleon signature scheme which provides nonrepudiation and non-transferability simultaneously. However, the initial chameleon hash schemes suffer from the key exposure problem： non-transferability is based on an unsound assumption that the designated receiver is willing to abuse his private key regardless of its exposure. Recently, several key-exposure-free chameleon hashes have been constructed based on RSA assumption and SDH （strong Diffie-Hellman） assumption. In this paper, we propose a factoring-based chameleon hash scheme which is proven to enjoy all advantages of the previous schemes. In order to support it, we propose a variant Rabin signature scheme which is proven secure against a new type of attack in the random oracle model.
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| 关 键 词： | 谕示模型 计算机 安全管理 数据 |
| 收稿时间： | 21 November 2005 |
| 修稿时间： | 2005-11-212006-09-11 |
Chameleon Hashes Without Key Exposure Based on Factoring |
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| Wei Gao,Xue-Li Wang,and Dong-Qing Xie.Chameleon Hashes Without Key Exposure Based on Factoring[J].Journal of Computer Science and Technology,2007,22(1):109-113. |
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| Authors: | Wei Gao Xue-Li Wang Dong-Qing Xie |
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| Affiliation: | 1.School of Mathematics and Econometrics, Hunan University, Changsha 410082, China; 2.School of Mathematics Science, South China Normal University, Guangzhou 510631, China;3.School of Computer and Communication, Hunan University, Changsha 410082, China |
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| Abstract: | Chameleon hash is the main primitive to construct a chameleon signature scheme which provides non-repudiation and non-transferability simultaneously. However, the initial chameleon hash schemes suffer from the key exposure problem: non-transferability is based on an unsound assumption that the designated receiver is willing to abuse his private key regardless of its exposure. Recently, several key-exposure-free chameleon hashes have been constructed based on RSA assumption and SDH (strong Diffie-Hellman) assumption. In this paper, we propose a factoring-based chameleon hash scheme which is proven to enjoy all advantages of the previous schemes. In order to support it, we propose a variant Rabin signature scheme which is proven secure against a new type of attack in the random oracle model. |
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| Keywords: | chameleon signature chameleon hash key-exposure |
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