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Computer Engineering ›› 2013, Vol. 39 ›› Issue (8): 38-43,54. doi: 10.3969/j.issn.1000-3428.2013.08.008

• Networks and Communications • Previous Articles     Next Articles

Hensel-lifting Computational Problem Based on Part Information Leaking

ZANG Tong-zheng   1, LV Ke-wei   2   

  1. (1. State Key Laboratory of Information Security, Graduate University of Chinese Academy of Sciences, Beijing 100049, China; 2. Institute of Information Engineering, Chinese Academy of Sciences, Beijing 100195, China)
  • Received:2012-03-26 Online:2013-08-15 Published:2013-08-13

基于部分信息泄露的Hensel提升计算问题

臧统政1,吕克伟2   

  1. (1. 中国科学院研究生院信息安全国家重点实验室,北京 100049;2. 中国科学院信息工程研究所,北京 100195)
  • 作者简介:臧统政(1986-),男,硕士研究生,主研方向:隐藏数问题;吕克伟,副教授
  • 基金资助:

    国家自然科学基金资助项目(60970154);中国科学院战略性先导专项基金资助项目“海云信息安全共性关键技术研究”(DXA06010702)

Abstract:

The original Hidden Number Problem(HNP) usually works with a prime modules or a special form composite number modulus. To break through the limitation, this paper presents a method which can resolve the HNP in regular non-prime modulus case. It promotes the HNP in prime modulus case to the HNP in prime powers modulus case by introducing the Hensel-lifting method and lattice rounding technique in a creative way, and combines the Chinese remainder theorem to receive the achievement. Analysis result shows that the discrete logarithm computational problem under the Hensel-lifting situation can be reduced to the HNP in prime modulus case.

Key words: Hidden Number Problem(HNP), Hensel-lifting, lattice rounding, Most Significant Bit(MSB), discrete logarithm, Chinese remainder theorem

摘要:

针对传统隐藏数仅局限于模素数或模特定形式合数的问题,利用Hensel提升和格归约技术,提出一种隐藏数问题由模素数向模一般形式合数提升的方法。将隐藏数问题由模素数向模素数方幂提升,运用中国剩余定理得到模一般形式合数下的隐藏数问题。利用该方法证明Hensel提升的离散对数计算,可归约到模素数情况下的隐藏数问题。

关键词: 隐藏数问题, Hensel提升, 格归约, 最大有意比特, 离散对数, 中国剩余定理

CLC Number: