| 无需随机预言模型的基于身份门限解密方案(英文) |
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| 引用本文： | 张席,陈泯融,刘浩.无需随机预言模型的基于身份门限解密方案(英文)[J].深圳大学学报(理工版),2010,27(3). |
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| 作者姓名： | 张席 陈泯融 刘浩 |
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| 作者单位： | 1. 深圳大学计算机与软件学院,深圳,518060
2. 深圳大学信息工程学院,深圳,518060 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 采用双线性对原理,提出无需随机预言模型下可证明安全的基于身份门限的解密方案,解决了当前基于身份门限解密方案需要依赖随机预言模型,才能证明其安全性或其安全性归约松散性的问题.给出一个新的密钥提取算法,模拟者可成功应答敌手的私钥提取查询,使方案的选择密文安全性证明具有紧致的安全归约.与现有的基于身份的门限解密方案相比,该方案在不依赖随机预言模型下也能满足紧致安全性归约.
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| 关 键 词： | 数据安全与计算机安全 基于身份的密码学 门限解密 无随机预言模型 紧致安全性归约 |
Practical identity-based threshold decryption scheme without random oracle |
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| ZHANG Xi,CHEN Min-rong,LIU Hao.Practical identity-based threshold decryption scheme without random oracle[J].Journal of Shenzhen University(Science &engineering),2010,27(3). |
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| Authors: | ZHANG Xi CHEN Min-rong LIU Hao |
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| Abstract: | Existing IBTD schemes either are only secure in the random oracles or have a loose security reduction. An identity-based threshold decryption (IBTD) scheme which made use of bilinear pairing to guarantee safety without random oracles was proposed. The novelty of lies in the extraction of keys, which enables the simulator to successfully answer private key extraction queries, thus the security proof for the chosen-ciphertext security has a tight security reduction. Compared with the existing IBTD schemes, this new scheme has the advantages of satisfying the tight security reduction without random oracles. |
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| Keywords: | data security and computer security identity-based cryptography threshold decryption without random oracle model tight security reduction |
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