2016 年 9 月 Chinese Journal of Network and Information Security September 2016
00099-1
第 2 卷第 9 期 网络与信息安全学报 Vo l . 2
No.9
可实现固定用户安全访问移动终端外包
数据的非对称代理重加密系统
郝伟
1,2
,王绪安
1,2
,杨晓元
1,2
,吴立强
1,2
(1. 武警工程大学电子技术系,陕西 西安 710086;
2. 武警工程大学网络与信息安全武警部队重点实验室,陕西 西安 710086)
摘 要:为实现固定用户安全共享移动终端的加密数据,提出了跨加密系统的非对称代理重加密系统。在该系
统中,计算能力有限的移动终端使用相对简单的基于身份的加密系统,而服务器和固定用户使用较复杂的基于
身份的广播加密系统。该系统基于密文转换机制,使移动终端简单的 IBE 密文被代理者转换成复杂的 IBBE 密
文,同时代理者不会得知明文的任何信息。该方案的安全性可以归约到底层的 IBE 和 IBBE 方案的安全性。理
论和实验分析表明,该方案可实现移动终端只需很少的资源便能让固定用户安全地共享其加密数据。
关键词:代理重加密;基于身份的加密;基于身份的广播加密;安全共享
中图分类号:TP309
文献标识码:A
doi: 10.11959/j.issn.2096-109x.2016.00099
Asymmetric proxy re-encryption system achievable for office user
to securely sharing outsourcing data of mobile terminal
HAO Wei
1,2
, WANG Xu-an
1,2
, YANG Xiao-yuan
1,2
, WU Li-qiang
1,2
(1. Electronic Department Engineering, College of Chinese People’s Armed Police, Xi’an 710086, China;
2. Key Laboratory of Network & Information Security Engineering, College of Chinese People’s Armed Police, Xi’an 710086, China)
Abstract: In order to realize the office users securely share encrypted data of the mobile terminal, an asymmetric
cross-cryptosystem proxy re-encryption system is proposed. In this system, mobile terminals who have the limited
computing power use relatively simple identity-based encryption system, while the server and office users use more
complex identity-based broadcast encryption system. This system is based on the ciphertext conversion mechanism,
which enables the simple IBE ciphertext of mobile terminal to be converted into the complex IBBE ciphertext by
proxy while the proxy know nothing of the plaintext. The security of this scheme can be reduced to the safety of the
IBE and IBBE scheme. Theoretical and experimental analysis indicate that the scheme is useful for the mobile ter-
minal to consume less resources to make the fixed users share the data encrypted by mobile terminal, and it is more
practical.
Key words: proxy re-encryption, identity-based encryption, identity-based broadcast encryption, securely sharing
收稿日期:2016-08-07;修回日期:2016-09-03。通信作者:杨晓元,15229343424@163.com
基金项目:国家自然科学基金资助项目(No.61272492,No.61572521);陕西省自然科学基金资助项目(No.2014JM8300);
武警工程大学基础研究基金资助项目(No.WJY201422,No.WJY201523)
Foundation Items: The National Natural Science Foundation of China(No.61272492, No.61572521), The Natural Science
Foundation of Shaanxi Province(No.2014JM8300), The Basic Research Program of Engineering University of Chinese People’s
Armed Police (No.WJY201422, WJY201523)