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My main research area is
information security, including cryptology and digital
watermarking.
Papers:
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4)Lizhen Yang, Kefei Chen, Xiaoyun Wang. Cryptanalysis of self-shrinking generator,
Electronics Letters,Volume: 39 Issue: 22 , 30 Oct. 2003 Page(s): 1586 -1586.
Download: word pdf
ps
Abtract: A simple cryptanalysis of the
self-shrinking generator with very short keystream for the case of
unknown connection polynomial is provided. The expected complexity
of this cryptanalysis is 2^{1.5L} when
the length of the LFSR of the generator is L. |
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3)杨礼珍,陈克非. 变换矩阵(mod n)的阶及两种推广Arnold 变换矩阵. 中国科学.
下载: pdf
word
摘要:在本文中，我们分析了矩阵(mod n)的阶的结构，然后给出有限域上的矩阵的阶和其Jordan 形的关系.然后我们给出两种2
维Arnold 变换矩阵的n 维推广：A 型Arnold
变换矩阵和B 型Arnold 变换矩阵，并在我们前面的结果的基础上给出它们的阶的分析结果和其它性质.
Lizhen
Yang, Kefei Chen, On the orders of transformation matrices
(mod n) and two types of generalized Arnold transformation
matrices, Science in China.
download:
pdf,
word
Abstract
In this paper, we analyze the structure of
the orders of matrices (mod n), and present the relation between the
orders of matrices over finite fields and their Jordan normal forms.
Then we generalize 2-dimensional Arnold transformation matrix to two
types of n-dimensional Arnold transformation matrices: A-type Arnold
transformation matrix and B-type transformation matrix, and analyze
their orders and other properties based on our former results about
the orders of matrices. |
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2)杨礼珍等. 非线性组合生成器的相关攻击的若干研究, 西安电子科技大学学报.
download: pdf,
word
摘要:
本文研究了对非线性组合生成器进行相关攻击时的整体策略；提出了最优恢复顺序的概念；把基于线性多项式重构的快速相关攻击推广到两个LFSR的情形，从而在LFSR的相关系数过小导致相关攻击失效时仍有可能利用相关攻击。
Yang
Li-Zhen, et. al, Research On Correlation Attacks On Nonlinear
Generator, Xian dianzi keji daxue xuebao.
Abstract：This
paper research on the whole scheme used by correlation attacks on
nonlinear generators, proposes the concept of optimum order of
recovery, and extends the fast correlation attacks through
reconstruction of linear polynomials to two LFSRs condition that
correlation attacks maybe used when the correlation coefficients are
too small to used correlation attacks. |
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1)胡予濮, 肖国镇, 杨礼珍, 朱红儒. 非齐次进位模加群及其在密码体制中的应用,
西安电子科技大学学报. |
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