检索结果-南通市图书馆

A better bound for implicit factorization problem with shared middle bits

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

science china(Information sciences) 2018年第3期61卷 108-117页

作者： Shixiong WANG longjiang qu chao li shaojing fu college of Computer National University of Defense Technology State Key Laboratory of Cryptology college of science National University of Defense Technology

This paper presents our investigation of the implicit factorization problem, where unknown prime factors of two RSA moduli share a certain number of middle bits. The problem is described as follows. Let N;= p;q;, N;=p;q;be two different n-bit RSA moduli, where q;, q;are both αn-bit prime *** that p;, p;share tn bits at positions from t;n to t;n =（t;+ t）n. Then this problem focuses on the condition about t, α to factor N;, N;efficiently. At PKC 2010, Faug`ere et al. showed that N;, N;can be factored when t > 4α. Subsequently, in 2015, Peng et al. improved this bound to t > 4α-3α;. In this paper,we directly apply Coppersmith’s method to the implicit factorization problem with shared middle bits, and a better bound t > 4α-4α;is obtained. The correctness of our approach is verified by experiments.

关键词： RSA implicit factorization problem middle bits lattice Coppersmith’s method

Construction of even-variable rotation symmetric Boolean functions with maximum algebraic immunity

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

science china(Information sciences) 2013年第3期56卷 60-68页

作者： fu shaojing li chao MATSUURA Kanta qu longjiang Department of Mathematics and System science National University of Defense Technology Institute of Industrial science University of TokyoTokyo 153-8505Japan State Key Laboratory of Information Security Graduate University of Chinese Academy of Sciences

Rotation symmetric Boolean functions(RSBFs) have been used as components of different *** this paper,we investigate n-variable(n even and n≥12) RSBFs to achieve maximum algebraic immunity(AI),and provide a construction of RSBFs with maximum AI and *** functions have higher nonlinearity than the previously known nonlinearity of RSBFs with maximum *** also prove that our construction provides high algebraic degree in some case.

关键词： Boolean function rotation symmetry algebraic immunity nonlinearity

The Existence of a Class of Balanced Multi-output Rotation Symmetric Boolean functions

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2018年第5期27卷 995-1001页

作者： DU Jiao fu shaojing qu longjiang li chao PANG Shanqi college of Mathematics and Information science Henan Normal University Henan Engineering Laboratory for Big Data Statistical Analysis and Optimal Control Henan Normal University college of Computer science National University of Defense Technology college of liberal Arts and science National University of Defense Technology

A new characterization of balanced rotation symmetric（n, m）-functions is presented. Based on the characterization, the nonexistence of balanced rotation symmetric（p;, m）-functions is determined, where p is an odd prime and m ≥ 2. And there exist balanced rotation symmetric（2;, m）-functions for 2 ≤ m ≤ 2;-r. With the help of these results, we also prove that there exist rotation symmetric resilient（2;, m）-functions for 2 ≤ m ≤ 2;-r-1.

关键词： Cryptography Rotation symmetric Orbit matrix Correlation immune Resilient functions

A lower dimension lattice attack on NTRU

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

science china(Information sciences) 2018年第5期61卷 329-331页

作者： Zhichao YANG shaojing fu longjiang qu chao li college of Computer National University of Defense Technology State Key Laboratory of Cryptology college of science National University of Defense Technology

Dear editor,Because of reasonably short length,easily created keys,high speed,low memory requirements and potential resistance to quantum attack,NTRU becomes one of the most popular public-key encryption systems and has drawn considerable *** by[1–9],we devote to constructing a class of lower dimension lattices,called the IN-Lattice,and proposing a new lattice attack on NTRU cryptosystem.

关键词： A lower dimension lattice attack on NTRU

New constructions of q-variable 1-resilient rotation symmetric functions over Fp

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

science china(Information sciences) 2016年第7期59卷 240-242页

作者： Jiao DU shaojing fu longjiang qu chao li Shanqi PANG college of science National University of Defense Technology School of Mathematics and Information science Henan Normal University Henan Engineering Laboratory for Big Data Statistical Analysis and Optimal Control Henan Normal University college of Computer science National University of Defense Technology

Dear editor,Motivated by Refs.[1–10],we devote to constructing a class of q-variable 1-resilient rotation symmetric functions（RSFs）over the finite field F;={0,1,...,p-1}in this *** this letter,let p and q be differ... 详细信息

关键词： over New constructions of q-variable 1-resilient rotation symmetric functions over F_p

Construction of Odd-Variable Boolean function with Maximum Algebraic Immunity Using Univariate Polynomial Representation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

china Communications 2012年第10期9卷 33-39页

作者： Zhao Wentao fu shaojing li chao qu longjiang college of Computer National University of Defense Technology Changsha 410073 P. R. China Department of Mathematics and System science National University of Defense Technology Changsha 410073 P. R. China Key Laboratory of Network Security and Cryptology Fujian Normal University Fuzhou 350007 P. R. China State key Laboratory of Information Security Chinese Academy of Science Beijing 100049 P. R. China

To protect against algebraic attacks, a high algebraic immunity is now an important criterion for Boolean functions used in stream ciphers. In this paper, a new method based on a univariate polynomial representation of Boolean functions is proposed. The proposed method is used to constmct Boolean functions with an odd number of variables and with maximum algebraic immunity. We also discuss the nonlinearity of the constructed functions. Moreover, a lower bound is deter- mined for the number of Boolean functions with rmximum algebraic immunity.

关键词： cryptography boolean function alge- braic attack algebraic immunity

维普期刊数据库

在线全文

学校读者我要写书评

暂无评论

偶变元MAI旋转对称布尔函数

国防科技大学学报 2012年第4期34卷 85-89页

作者：董德帅李超屈龙江付绍静国防科技大学理学院湖南长沙410073 国防科技大学计算机学院湖南长沙410073

代数免疫度是布尔函数的一个重要密码学指标。给出了具有最大代数免疫度的偶数元旋转对称布尔函数的两种构造方法。进一步地,研究了特殊情形时所构造的旋转对称布尔函数的非线性度,当n≥18时,构造3得到的MAI旋转对称布尔函数的非线性度... 详细信息

代数免疫度是布尔函数的一个重要密码学指标。给出了具有最大代数免疫度的偶数元旋转对称布尔函数的两种构造方法。进一步地,研究了特殊情形时所构造的旋转对称布尔函数的非线性度,当n≥18时,构造3得到的MAI旋转对称布尔函数的非线性度优于已知构造的偶数元MAI旋转对称布尔函数的非线性度。

关键词：布尔函数旋转对称对布尔函数代数免疫度非线性度

维普期刊数据库

Practical privacy-preserving compressed sensing image recovery in the cloud

在线全文

学校读者我要写书评

暂无评论

science china(Information sciences) 2017年第9期60卷 277-285页

作者： Kai HUANG Ming XU shaojing fu Dongsheng WANG college of Computer National University of Defense Technology State Key Laboratory of Cryptology

Imaging technology plays a significant role in various fields such as astronomy,monitoring,and medical *** traditional Shannon/Nyquist sampling theorem specifies that one must sample at least two times faster than the signal bandwidth to avoid loss of information when capturing an *** makes compression a necessity prior to storage or transmission[1]and may be

关键词： OMP Practical privacy-preserving compressed sensing image recovery in the cloud

A 2-kb Mycovirus Converts a Pathogenic fungus into a Beneficial Endophyte for Brassica Protection and Yield Enhancement

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2020年第10期13卷 1420-1433页

作者： Hongxiang Zhang Jiatao Xie Yanping fu Jiasen Cheng Zheng qu Zhenzhen Zhao Shufen Cheng Tao Chen Bo li Qianqian Wang Xinqiang liu Binnian Tian David B.Collinge Daohong Jiang State Key Laboratory of Agricultural Microbiology College of Plant Science and TechnologyHuazhong Agricultural UniversityWuhanHubei Province 430070China The Provincial Key Lab of Plant Pathology of Hubei Province Huazhong Agricultural UniversityWuhanChina Department of Plant and Environmental sciences University of Copenhagen1871 Frederiksberg CDenmark

Mycoviruses are viruses that infect fungi,and hypovirulence-associated mycoviruses have the potential to control fungal ***,it is unclear how mycovirus-mediated hypovirulent strains live and survive in the field,and no mycovirus has been applied for field crop *** this study,we found that a previously identified small DNA mycovirus(SsHADV-1)can convert its host,Sclerotinia sclerotiorum,from a typical necrotrophic pathogen to a beneficial endophytic ***-1 downregulates the expression of key pathogenicity factor genes in *** during *** growing in rapeseed,the SsHADV-1-infected strain DT-8 significantly regulates the expression of rapeseed genes involved in defense,hormone signaling,and circadian rhythm *** a result,plant growth is promoted and disease resistance is *** experiments showed that spraying DT-8 at the early flowering stage can reduce the disease severity of rapeseed stem rot by 67.6%and improve yield by 14.9%.Moreover,we discovered that SsHADV-1 could also infect other *** strains on DT-8-inoculated plants and that DT-8 could be recovered from dead *** findings suggest that the mycoviruses may have the ability to shape the origin of *** discoveries suggest that mycoviruses may influence the origin of endophytism and may also offer a novel strategy for disease control in which mycovirus-infected strains are used to improve crop health and release mycoviruses into the field.

关键词： mycovirus Sclerotinia sclerotiorum endophyte rapeseed stem rot biological control Brassica napus