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条件型非对称跨加密系统的代理重加密方案
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
作者姓名:郝伟  杨晓元  王绪安  吴立强
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
基金项目:国家自然科学基金资助项目(61272492,61572521)。
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。

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
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
Authors:HAO Wei  YANG Xiaoyuan  WANG Xu'an  WU Liqiang
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
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.
Keywords:Identity-Based Encryption (IBE)   Identity-Based Broadcast Encryption (IBBE)   conditional identity-based broadcast proxy re-encryption   proxy re-encryption
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