标准模型下密钥保密的条件代理重加密

doi:10.3969/j.issn.1006-2475.2012.11.034

计算机与现代化 ›› 2012, Vol. 1 ›› Issue (11): 134-141.doi: 10.3969/j.issn.1006-2475.2012.11.034

标准模型下密钥保密的条件代理重加密

任勇军^1,2，徐新卫³，方乐³

1.南京信息工程大学江苏省网络监控中心，江苏南京 210044；2.南京信息工程大学计算机与软件学院，江苏南京 210044；3.安徽工业大学管理科学与工程学院，安徽马鞍山 243002

收稿日期:2012-06-11 修回日期:1900-01-01 出版日期:2012-11-10 发布日期:2012-11-10
通讯作者: 徐新卫

Key Private Conditional Proxy Re-encryption in Standard Model

REN Yong-jun^1,2, XU Xin-wei³, FANG Le³

1. Jiangsu Engineering Center of Network Monitoring, Nanjing University of Information Science & Technology, Nanjing 210044, China;2. School of Computer & Software, Nanjing University of Information Science & Technology, Nanjing 210044, China;3. School of Management Science and Engineering, Anhui University of Technology, Ma’anshan 243002, China

Received:2012-06-11 Revised:1900-01-01 Online:2012-11-10 Published:2012-11-10
Contact: XU Xin-wei

摘要/Abstract

摘要： 代理重加密方案（PRE）使代理者能够把用委托者公钥加密的密文转换成受委托者的密文，而代理者并不能得到明文。由于这个优良的特性，使得代理重加密广泛应用于加密后的信息通信领域，比如被加密的电子邮件传输等。但是，现有的条件代理重加密方案都不能提供密钥保密的特性。为此，本文基于3-QDBDH和Truncated q-ABDHE问题，提出第一个标准模型下达到CCA安全的密钥保密的条件重加密方案。

关键词: 条件代理重加密, 密钥保密, 标准模型

Abstract: In proxy re-encryption, a proxy can transform the ciphertext under the delegator’s public key into another ciphertext that the delegatee can decrypt by its own private key. However, the proxy cannot access the plaintext. Due to its transformation property, proxy re-encryption can be used in many encrypted communication applications, such as encrypted email forwarding. However none of the existing conditional proxy re-encryption schemes satisfies key private. Based on the decision bilinear Diffie–Hellman assumption and the truncated q-ABDHE assumption, this paper proposes the first such CCA security conditional proxy re-encryption in the standard model.

Key words: conditional proxy re-encryption, key private, standard model

中图分类号:

TP309

任勇军;徐新卫;方乐. 标准模型下密钥保密的条件代理重加密[J]. 计算机与现代化, 2012, 1(11): 134-141.

REN Yong-jun;XU Xin-wei;FANG Le. Key Private Conditional Proxy Re-encryption in Standard Model[J]. Computer and Modernization, 2012, 1(11): 134-141.

标准模型下密钥保密的条件代理重加密

Key Private Conditional Proxy Re-encryption in Standard Model

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