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A Mathematical Approach for Generating a Highly Non-Linear Substitution Box Using Quadratic Fractional Transformation

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Computers, Materials & Continua 2023年第11期77卷 2565-2578页

作者： abid mahboob Muhammad Asif Rana Muhammad Zulqarnain Imran Saddique Hijaz Ahmad Sameh Askar Department of Mathematics Division of Science and TechnologyUniversity of EducationLahorePakistan Department of Mathematics University of Management and TechnologySialkot Campus51310Pakistan School of Mathematical Sciences Zhejiang Normal UniversityJinhua321004China Department of Mathematics University of Management and TechnologyLahore54770Pakistan Section of Mathematics International Telematic University UninettunoCorso Vittorio Emanuele IIRoma39-00186Italy Department of Statistics and Operations Research College of ScienceKing Saud UniversityP.O.Box 2455Riyadh11451Saudi Arabia

Nowadays,one of the most important difficulties is the protection and privacy of confidential *** address these problems,numerous organizations rely on the use of cryptographic techniques to secure data from illegal activities and *** cryptographic ciphers use the non-linear component of block cipher to ensure the robust encryption process and lawful decoding of plain data during the decryption *** the designing of a secure substitution box(S-box),non-linearity(NL)which is an algebraic property of the S-box has great ***,the main focus of cryptographers is to achieve the S-box with a high value of *** this suggested study,an algebraic approach for the construction of 16×16 S-boxes is provided which is based on the fractional transformation Q(z)=1/α(z)^(m)+β(mod257)and finite *** technique is only applicable for the even number exponent in the range(2-254)that are not multiples of ***,we choose a quadratic fractional transformation,swap each missing element with repeating elements,and acquire the initial *** the second stage,a special permutation of the symmetric group S256 is utilized to construct the final S-box,which has a higher NL score of 112.75 than the Advanced Encryption Standard(AES)S-box and a lower linear probability score of *** addition,a tabular and graphical comparison of various algebraic features of the created S-box with many other S-boxes from the literature is provided which verifies that the created S-box has the ability and is good enough to withstand linear and differential *** different analyses,it is ensured that the proposed S-boxes are better than as compared to the existing *** these S-boxes can be utilized in the security of the image data and the text data.

关键词： Block cipher S-box data security fractional transformation

On ev and ve-Degree Based Topological Indices of Silicon Carbides

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Computer Modeling in Engineering & Sciences 2022年第2期130卷 871-885页

作者： Jung Rye Lee Aftab Hussain Asfand Fahad Ali Raza Muhammad Imran Qureshi abid mahboob Choonkil Park Department of Data Science Daejin UniversityKyunggi11159Korea Department of Mathematics King Abdulaziz UniversityJeddah21589Saudi Arabia Department of Mathematics COMSATS University IslamabadVehari61110Pakistan Department of Mathematics Division of Science&TechnologyUniversity of EducationLahorePakistan Research Institute for Natural Sciences Hanyang UniversitySeoul04763Korea

In quantitative structure-property relationship(QSPR)and quantitative structure-activity relationship(QSAR)studies,computation of topological indices is a vital tool to predict biochemical and physio-chemical properties of chemical *** topological indices have been inaugurated to describe different topological *** ev and ve-degree are recently introduced novelties,having stronger prediction *** this article,we derive formulae of the ev-degree and ve-degree based topological indices for chemical structure of Si_(2)C_(3)−I[a,b].

关键词： Topological indices silicon carbide ev-degree ve-degree

An Innovative Technique for Constructing Highly Non-Linear Components of Block Cipher for Data Security against Cyber Attacks

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Computer Systems Science & Engineering 2023年第11期47卷 2547-2562页

作者： abid mahboob Muhammad Asif Rana Muhammad Zulqarnain Imran Siddique Hijaz Ahmad Sameh Askar Giovanni Pau Department of Mathematics Division of Science and TechnologyUniversity of EducationLahorePakistan Department of Mathematics University of Management and TechnologySialkot CampusSialkot51310Pakistan School of Mathematical Sciences Zhejiang Normal UniversityJinhua321004China Department of Mathematics University of Management and TechnologyLahorePakistan Section of Mathematics International Telematic University UninettunoCorso Vittorio Emanuele II39Roma00186Italy Department of Statistics and Operations Research College of ScienceKing Saud UniversityP.O.Box 2455Riyadh11451Saudi Arabia Faculty of Engineering and Architecturer-Kore University of Enna Enna94100Italy

The rapid advancement of data in web-based communication has created one of the biggest issues concerning the security of data carried over the internet from unauthorized *** improve data security,modern cryptosystems use ***,data privacy has become a key concern for consumers who transfer sensitive data from one place to *** address these problems,many companies rely on cryptographic techniques to secure data from illegal activities and *** these cryptographic approaches,AES is a well-known algorithm that transforms plain text into cipher text by employing substitution box(S-box).The S-box disguises the relationship between cipher text and the key to guard against cipher *** security of a cipher using an S-box depends on the cryptographic strength of the respective ***,various researchers have employed different techniques to construct high order non-linear *** paper provides a novel approach for evolving S-boxes using coset graphs for the action of the alternating group A5 over the finite field and the symmetric group *** motivation for this work is to study the symmetric group and coset *** authors have performed various analyses against conventional security criteria such as nonlinearity,differential uniformity,linear probability,the bit independence criterion,and the strict avalanche criterion to determine its high cryptographic *** evaluate its image application performance,the proposed S-box is also used to encrypt digital *** performance and comparison analyses show that the suggested S-box can secure data against cyber-attacks.

关键词： Block cipher coset graphs s-box triangular group

Changes in Phyto-Chemical Status upon Viral Infections in Plant:A Critical Review

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Phyton-International Journal of Experimental Botany 2021年第1期90卷 75-86页

作者： Tehmina Bahar Adeeba mahboob Qureshi Fasiha Qurashi Muniba abid Misbah Batool Zahra Muhammad Saleem Haider Institute of Agricultural Sciences University of the PunjabLahore54590Pakistan Department of Forestry Range and Wildlife ManagementUniversity College of Agriculture and Environmental SciencesThe Islamia University of BahawalpurBahawalpur63100Pakistan

Most damaging plant diseases have been caused by viruses in the entire *** tropical and subtropical areas,the damage caused by plant virus leads to great economic and agricultural *** stranded DNA viruses(geminiviruses)are the most perilous pathogens which are responsible for major diseases in agronomic and horticultural *** begomoviruses and mastreviruses are the biggest genus of plant infecting viruses,transmitted though Bemisia tabaci and members of Cicadellidae *** possesses some naturally existing chemicals term as phyto-chemicals which perform important functions in the *** antioxidant enzymes are used by plants for selfdefense upon foreign invasion of *** review explains the present perceptive of influence of viral infections on phyto-chemicals,oxidative enzymes and biochemical changes occurring in the *** infection mediated phytochemical changes in plants mainly includes:up and down regulation of photosynthetic pigment,increase in the concentration of phenolic compounds,elevation of starch content in the leaf and up&down regulation of anti-oxidative enzymes including(GPX)guaiacol peroxidase,(PPO)polyphenol oxidase,(APX)ascorbate peroxidase,(SOD)superoxide dismutase and(CTA)*** changes lead to initiation of hypersensitive response,by thicken of the leaf lamina,lignification under the leaf surface,blocking to stomatal openings,systematic cell death,generation of reactive oxidative species(ROS),activation of pathogen mediated resistance pathways i.e.,production of salicylic acid and jasmonic *** all the physiological changes in the plant due to viral infection supports the activation of defense mechanism of the plant to combat against viral infection by limiting virus in specific area,followed with the production of barriers for pathogen,accumulation of starch in the leaf and excess production of(ROS).These strategies used by the plant to prevent the spread of viru

关键词： Anti-oxidative enzymes defense mechanism phyto-chemicals viral infection

Intramolecular cyclization of steroidal semicarbazones to pyrazoles using Vilsmeier reagent

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Chinese Chemical Letters 2008年第2期19卷 133-136页

作者： mahboob Alam M. Mushfiq Department of Chemistry Aligarh Muslim University Aligarh 202002 India

The preparation of hitherto unknown steroidal heterocycles containing pyrazole fused to 6,7-position of the steroidal nucleus is described. These heterocycles were prepared by the action of Vilsmeier reagent with steroidal semicarbazones in DMF. The structure of the compounds has been established on the basis of their elemental analysis and spectral data. A general mechanistic scheme for these reactions is also suggested based on current and previous results.

关键词： Steroidal semicarbazones Heterocycles Vilsmeier reagent Pyrazoles

The synthesis of 2′-amino-5α-cholest-6-eno [6,7-d]-thiazole derivatives under microwave irradiation using dry-media conditions

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Chinese Chemical Letters 2008年第9期19卷 1027-1030页

作者： Azharullah Khan mahboob Alam M.Mushfiq Department of Chemistry Aligarh Muslim UniversityAligarh 202002India Department of Chemistry Aligarh Muslim University

A convenient, rapid and efficient method for the synthesis of substituted steroidal [6,7-d] thiazoles using microwave-induced organic reaction enhancement chemistry has been developed. The additional features of this methodology include a much faster reaction, easy workup, high yield, high purity of the products and an environment friendly approach.

关键词： Dry media Neutral alumina Phenylthiourea Iodine and saturated steroidal ketones

Exploring the nano-fungicidal efficacy of green synthesized magnesium oxide nanoparticles(MgO NPs)on the development,physiology,and infection of carrot(Daucus carota L.)with Alternaria leaf blight(ALB):Molecular docking

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Journal of Integrative Agriculture 2023年第10期22卷 3069-3080页

作者： Lukman AHAMAD Azmat ALI KHAN Masudulla KHAN Orudzhev FARID mahboob ALAM Plant Pathology/Nematology Laboratory Department of BotanyAligarh Muslim UniversityAligarh 202002India Regional Plant Quarantine Station Salt LakeKolkata 700097India Pharmaceutical Biotechnology Laboratory Department of Pharmaceutical ChemistryCollege of PharmacyKing Saud UniversityRiyadh 11451Saudi Arabia Botany Section Women’s CollegeAligarh Muslim UniversityAligarh 202002India Amirkhanov Institute of Physics Dagestan Federal Scientific CenterRussian Academy of SciencesMakhachkala 367003Russia Department of Safety Engineering Dongguk UniversityGyeongju-si 780714Republic of Korea

In this research,green synthesized magnesium oxide nanoparticles(MgO NPs)from lemon fruit extracts and their fungicidal potential was evaluated against Alternaria dauci infection on carrot(Daucus carota L.)under greenhouse *** scanning and transmission electron microscopy(SEM and TEM)and ultra-violet(UV)visible spectroscopy were used to validate and characterize MgO *** crystalline nature of MgONPs was determined using selected area electron diffraction(SAED).MgO NPs triggered substantial antifungal activity against *** when exposed to 50 and 100 mg L^(–1)concentrations but the higher antifungal potential was noticed in 100 mg L^(–1)under invitro *** fungal inoculated plants,a marked decrease in growth,photosynthetic pigments,and an increase in phenol,proline contents,and defense-related enzymes of carrot were seen over control(distilled water).However,foliar application of MgO NPs at 50 and 100 mg L^(–1)resulted in significant improvement of plant growth,photosynthetic pigments,phenol and proline contents,and defense enzymes activity of carrots with and without *** *** of MgO NPs at 100 mg L^(–1)had more plant length(17.11%),shoot dry weight(34.38%),plant fresh weight(20.46%),and root dry weight(49.09%)in carrots when challenged with *** over inoculated *** leaf blight indices and percent disease severity were also reduced in *** inoculated plants when sprayed with MgO *** non-bonding interactions of Alternaria genus protein with nanoparticles were studied using molecular docking.

关键词： green synthesis MgO nanoparticles alternaria leaf blight photosynthetic pigments defense enzymes carrot

Diversity of Freshwater Fungi along Laoyu River

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Diversity of Freshwater Fungi along Laoyu River

作者： mahboob mahboobullah（曼布）昆明理工大学

学位级别：硕士

Freshwater fungi are important natural resources in agriculture,medicine,and the ***,human and industrial activities due to deforestation,irrigation,urbanization increase the amount of debris from different substrates,and their decomposition in the water,especially water bodies,affect the diversity of the freshwater fungi and the water *** are found in freshwaters at certain period or throughout their *** fungi are categorized into leaf-inhabiting（ngoldian）,wood decomposing（lignicolous）and the lower *** is no report on the freshwater fungal diversity from river Laoyu,*** study evaluated the diversity and morphological features of freshwater fungi in River Laoyu in *** objectives of this study were;to evaluate the diversity and biology of freshwater fungi,and the potential application of freshwater fungi for environmental monitoring of River Laoyu,China;believed to have unique *** of water and woody substrate were collected from the river in a plastic vials and zipper plastic bag,*** fungi were classified based on traditional and morphological features,species key to monograph was used for reference.A total of 254 fresh specimens,from which 68 species were encountered and 26 pure cultures and 10 species from different clade were identified based on morphological *** on morphological data,two new ascomycetous and hyphomycetous like taxa were *** morphological descriptions and notes were provided for *** study provides a basis for further research on freshwater fungi diversity and the potential utilization of fungal resources for sustainable ecological and industrial development.

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Silica-supported Thionyl Chloride-assisted Synthesis and Bioassay of Novel Tetrazinan-3-thione and 3-Oxo-pyrazolidine-4-carbonitrile Derivatives of Steroids

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Chemical Research in Chinese Universities 2014年第1期30卷 55-62页

作者： PARVEEN Mehtabl MALLA Ali Mohammed ALl Akhtar ALAM mahboob MUSTAFA Mir Faisal Department of Chemistry Aligarh Muslim University Aligarh 202002 India Department of Biochemistry Aligarh Muslim University Aligarh 202002 India

A series of tetrazinan-3-thione and 3-oxo-pyrazolidine-4-carbonitrile derivatives of steroids（1-3） were synthesized with silica-chloride as a heterogeneous *** synthesized compounds 4-9 were obtained in substantial *** vitro evaluation of anticancer and antioxidant activity of the synthesized compounds was carried out via 3-（4,5-dimethylthiazol-2-yl）-2,5-diphenyltetrazolium bromide（MTT） and 1,1-diphenyl-2-picrylhydrazyl（DPPH）assays,*** 6 exhibited promising anti-proliferative activity towards a panel of cancer cell *** significant activity of compound 6 was further ascertained on structural,molecular modelling and docking *** study may provide a valuable insight into the further design and development of more potent biologically active compounds.

关键词： Steroid Biological evaluation Molecular docking