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Your search keyword '"Zhao, Xiao-Xin"' showing total 13 results
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13 results on '"Zhao, Xiao-Xin"'

2. On a Type of Linear Structures of NFSR Sequences

Author

Zhao, Xiao-Xin, Wang, Zhong-Xiao, Zheng, Qun-Xiong, Tang, Deng, and Qi, Wen-Feng

Abstract

Nonlinear feedback shift registers (NFSRs) are an important building blocks in the design of stream ciphers over the past years. An NFSR is vulnerable to cryptanalysis if there are output sequences with low linear complexities. In this paper, we present a method to find output sequences of an NFSR with low linear complexities from a new perspective. Let f be the characteristic function of an NFSR, and let $f_{L}$ be the linear part of f. First, we present some theoretical results in order to find sequences $\underline {a}\in G(f_{L})$ such that $\underline {a}\in G(f)$ . In particular, it is shown that if $f_{L}$ has divisors of the form $g(x^{d})$ , then $G(f)$ is more likely to have linear sequences. Then, we introduce two kinds of isomorphisms of NFSRs which could be used to find more potential linear sequences in $G(f)$ . Such isomorphisms induce a close relationship among the linear structures of NFSRs, whose realization relies on a type of decomposition of Boolean functions. As a generalization, we propose a framework to analyze the linear structure of a Galois NFSR. The idea is to focus on the Galois LFSR derived from the Galois NFSR by removing the nonlinear part, which can be transformed into an equivalent Fibonacci LFSR. Finally, we apply the results to some lightweight algorithms designed based on the cascade connections of NFSRs, and find several families of sequences generated by the main register of Lizard with linear complexities no more than 30.

Published
2025
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7. Identification and relative expression profile of HIPPs gene family cadmium stress in sugar beet.

Author

ZHAO Xiao-Xin, HUANG Shuo-Qi, TAN Wen-Bo, XING Wang, and LIU Da-Li

Abstract

Cadmium (Cd) ion balance and detoxification regulation are the cores of exploring cadmium tolerance mechanism in sugar beet, and the basis of heavy metal bioremediation using sugar beet. Heavy metal-associated isoprene plant proteins (HIPPs) are a class of multifunctional metal chaperone proteins, which may play a key role in absorption, transport, and compartmentalization of Cd ions. In the transcriptome expression profile of sugar beet responding to cadmium stress, BvHIPPs were found to be differentially expressed. Based on the above results, the whole BvHIPPs gene family members in beet genome was identified by bioinformatics method, and their physicochemical properties, evolutionary relationships, gene structure, cis-acting elements, chromosome localization, transcription, and expression characteristics under cadmium stress were analyzed. The results showed that there were 23 BvHIPPs family members in the beet genome, all of which contained HMA domains and isoprenylation motif, and 16 BvHIPPs were predicted to be located in the nucleus. According to cis-acting element analysis, beet BvHIPPs can participate in a variety of biological and abiotic stress responses. Transcriptomic analysis showed that all 23 BvHIPPs differentially participated in sugar beet in response to Cd, and qRT-PCR analysis verified furtherly the regulatory characteristics of the BvHIPPs correlated with Cd response. BvHIPPs might play an essential role in the adaptation of sugar beet to cadmium stress. The results suggest that BvHIPPs may play an important role in the process of beet adaptation to cadmium stress, and the results will lay a foundation for the molecular mechanism of beet bioremediation in heavy metal pollution. [ABSTRACT FROM AUTHOR]

Published
2023
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