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基于身份加密中可验证的私钥生成外包算法

任艳丽，蔡建兴，黄春水，谷大武   

  1. 1. 上海大学 通信与信息工程学院，上海200444；2. 上海交通大学 电子信息与电气工程学院，上海 200240
  • 出版日期:2015-11-27 发布日期:2015-11-27
  • 基金资助:
    国家自然科学基金资助项目（61202367, 61572309）；教育部博士点基金资助项目（20120073110094）；上海市教委创新基金资助项目（14YZ020）

Verifiable outsourcing private key generation algorithm in an identity-based encryption scheme

  • Online:2015-11-27 Published:2015-11-27

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597

被引次数

5

摘要： 提出了包含私钥生成外包算法的基于身份加密方案，PKG将私钥生成的任务外包给服务器，并能有效验证外包结果的正确性。在标准模型中证明了方案的密文不可区分性和外包结果的可验证性，并对所提方案进行了仿真实现。实验结果表明，外包算法中PKG的计算量远小于直接生成用户私钥，且小于服务器的计算量。

关键词: 云计算；大数据；基于身份加密；可验证外包计算；合数阶群

Abstract: An identity-based encryption scheme with verifiable outsourcing private key generation algorithm was proposed where the PKG outsourcers the task of private key generation to the server, and could verify the correctness of the outsourcing result effectively. The distinguish ability of the cipher text and verifiability of the outsourcing result was proved without random oracles, and the proposed scheme was realized in a simulation environment. The experiment shows that the cost of the PKG is smaller than that of the servers, and it is much smaller than that of computing the private keys of all users directly.

Key words: cloud computing; big data; identity-based encryption; verifiable outsourcing computing; groups of composite order

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