计算机工程与应用 ›› 2013, Vol. 49 ›› Issue (21): 101-105.

• 网络、通信、安全 • 上一篇    下一篇

破解较快速的整数上的全同态加密方案

古春生1,2,景征骏1,3,于志敏1   

  1. 1.江苏技术师范学院 计算机工程学院,江苏 常州 213001
    2.中国科学技术大学 计算机科学与技术学院,合肥 230027
    3.南京邮电大学 计算机学院,南京 210003
  • 出版日期:2013-11-01 发布日期:2013-10-30

Breaking faster fully homomorphic encryption scheme over integer

GU Chunsheng1,2, JING Zhengjun1,3, YU Zhimin1   

  1. 1.School of Computer Engineering, Jiangsu Teachers University of Technology, Changzhou, Jiangsu 213001, China
    2.School of Computer Science and Technology, University of Science and Technology of China, Hefei 230027, China
    3.School of Computer Science, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
  • Online:2013-11-01 Published:2013-10-30

摘要: 研究分析优化的全同态加密方案的安全性十分重要。针对汤等人设计的全同态加密方案,使用格归约攻击方法直接获取密文中的明文比特,从而破解了该较快速的全同态加密方案。

关键词: 全同态加密, 近似最大公约数(GCD)问题, 密码分析, 格归约攻击

Abstract: It is very important to analyze the security of optimizing fully homomorphic encryption scheme. For the fully homomorphic encryption scheme designed by Tang et al., this paper directly obtains the plaintext bit from a ciphertext by applying lattice reduction attack. Thus, this faster fully homomorphic encryption scheme is broken.

Key words: fully homomorphic encryption, approximate Greatest Common Divisor(GCD), cryptanalysis, lattice reduction attack