| 条件型非对称跨加密系统的代理重加密方案 |
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| 引用本文： | 郝伟,杨晓元,王绪安,吴立强. 条件型非对称跨加密系统的代理重加密方案[J]. 计算机应用, 2016, 36(9): 2452-2458. DOI: 10.11772/j.issn.1001-9081.2016.09.2452 |
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| 作者姓名： | 郝伟 杨晓元 王绪安 吴立强 |
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| 作者单位： | 1. 武警工程大学 电子技术系, 西安 710086;2. 武警部队网络与信息安全保密重点实验室, 西安 710086 |
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| 基金项目： | 国家自然科学基金资助项目（61272492，61572521）。 |
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| 摘 要： | 为了减轻云应用中移动设备解密的负担，利用基于身份的广播加密（IBBE）、基于身份的加密（IBE）、基于身份的条件型广播代理重加密方案，提出了多条件型非对称跨加密系统的代理重加密方案。该方案允许发送方将信息加密成IBBE密文，一次性发送给多个接收方，其中任一接收方又可以授权给代理者一个多条件型的重加密密钥，代理者利用该多条件型重加密密钥，能将符合多个条件的原始密文重加密成一个新的接收方可以解密的IBE密文。该方案实现了从IBBE加密系统到IBE加密系统的非对称代理重加密，而且代理者可以根据条件将最初的原始密文进行重加密，避免了不需要进行重加密的原始密文被代理者重加密，提高了代理者重加密的效率，同时节约了接收方获悉正确明文的时间。
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| 关 键 词： | 基于身份的加密 基于身份的广播加密 基于身份的条件型广播代理重加密 代理重加密 |
| 收稿时间： | 2016-01-27 |
| 修稿时间： | 2016-03-15 |
Proxy re-encryption scheme based on conditional asymmetric cross-cryptosystem |
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| HAO Wei,YANG Xiaoyuan,WANG Xu'an,WU Liqiang. Proxy re-encryption scheme based on conditional asymmetric cross-cryptosystem[J]. Journal of Computer Applications, 2016, 36(9): 2452-2458. DOI: 10.11772/j.issn.1001-9081.2016.09.2452 |
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| Authors: | HAO Wei YANG Xiaoyuan WANG Xu'an WU Liqiang |
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| Affiliation: | 1. Department of Electronic Technology, Engineering University of Chinese People's Armed Police Force, Xi'an Shaanxi 710086, China;2. Key Laboratory of Network and Information Security, Chinese People's Armed Police Force, Xi'an Shaanxi 710086, China |
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| Abstract: | In order to reduce the decryption burden of the mobile device in cloud application, using Identity-Based Broadcast Encryption (IBBE) scheme, Identity-Based Encryption (IBE) scheme and conditional identity-based broadcast proxy re-encryption scheme, an asymmetric cross-cryptosystem proxy re-encryption scheme with multiple conditions was proposed. In this scheme, the sender is allowed to encrypt information into IBBE ciphertext, which can be sent to multiple recipients at a time. Anyone of the receivers can authorize a multi-condition re-encryption key to the proxy to re-encrypt the original ciphertext which meets the conditions into the IBE ciphertext that a new receiver can decrypt. The scheme realizes asymmetric proxy re-encryption from IBBE encryption system to IBE encryption system and allows the proxy to re-encrypt the original ciphertext according to the conditions, which avoids the proxy to re-encrypt the unnecessary original ciphertext. The scheme not only improves the re-encryption efficiency of the proxy, but also saves the time of the receiver to get the correct plaintext. |
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| Keywords: | Identity-Based Encryption (IBE) Identity-Based Broadcast Encryption (IBBE) conditional identity-based broadcast proxy re-encryption proxy re-encryption |
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