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计算机工程 ›› 2012, Vol. 38 ›› Issue (24): 1-4. doi: 10.3969/j.issn.1000-3428.2012.24.001

所属专题: 云计算专题

• 云计算专题 • 上一篇    下一篇

基于整数多项式环的全同态加密算法

徐 鹏,刘 超,斯雪明   

  1. (信息工程大学信息工程学院,郑州 450002)
  • 收稿日期:2012-06-08 修回日期:2012-06-30 出版日期:2012-12-20 发布日期:2012-12-18
  • 作者简介:徐 鹏(1986-),男,硕士,主研方向:云计算,信息安全;刘 超,讲师;斯雪明,副研究员
  • 基金资助:
    国家“863”计划基金资助项目“新概念高效能计算机体系结构及系统研究开发”(2009AA012201)

Fully Homomorphic Encryption Algorithm Based on Integer Polynomial Ring

XU Peng, LIU Chao, SI Xue-ming   

  1. (School of Information Engineering, Information Engineering University, Zhengzhou 450002, China)
  • Received:2012-06-08 Revised:2012-06-30 Online:2012-12-20 Published:2012-12-18

摘要: 为确保云计算环境下用户数据的安全性,利用同态加密算法对数据和加密函数的隐私保护功能,设计一种基于整数多项式环的全同态加密算法。该算法包括同态算法和重加密算法,前者针对明文数据进行加密,后者针对密文数据进行二次加密。分析结果表明,该算法的计算复杂度为O(n5),低于理想格全同态加密算法。

关键词: 全同态加密算法, 云计算安全, 数据加密, 理想格, 近似最大公约数, 隐私保护

Abstract: To ensure the user data security under cloud computing environment, this paper uses homomorphism encryption algorithm for data and encryption function of privacy protection function, and designs a new fully homomorphic encryption algorithm based on integral polynomial ring. Both the homomorphic encryption and the re-encryption are included in the algorithm. The homomorphic encryption is used to encrypt the data, and re-encryption is used to encrypt the encrypted data. Analysis result shows that the proposed algorithm computing complexity O(n5) is lower than ideal lattice fully homomorphic encryption.

Key words: fully homomorphic encryption algorithm, cloud computing security, data encryption, ideal lattice, approximate Greatest Common Divisor(GCD), privacy protection

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