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移动云计算中信息的安全防护方法研究

移动云计算中信息的安全防护方法研究

作者： khan abdul basit（刘星）兰州交通大学

学位级别：硕士

云计算及移动云计算因在时间效率,成本效益,以及高效利用计算资源等方面展现出了明显优势,从而备受业界的广泛关注。然而,在这一技术逐步发展的过程中仍存在大量亟需解决的问题,如在信息传递的过程中如何确保用户数据安全,防止信息泄露... 详细信息

云计算及移动云计算因在时间效率,成本效益,以及高效利用计算资源等方面展现出了明显优势,从而备受业界的广泛关注。然而,在这一技术逐步发展的过程中仍存在大量亟需解决的问题,如在信息传递的过程中如何确保用户数据安全,防止信息泄露,针对开发者的诚信问题等。鉴于此种情况,用户需要将线上的数据转移至云服务器。但是考虑到用户信息的安全和隐私这些数据通常是由供应商来进行统一的控制管理,这导致用户自身无法意识到其中潜在的问题,如个人数据的安全完整和隐私,进而无法对此种情况提出有效的解决方案。目前已有很多学者提出了多种方法来解决用户的安全隐私问题,如通过提高操作系统的安全性,在软件及硬件层面上进行保护,使用虚拟技术等。但这些方案一般并不能为现有问题提供系统的解决方案,同时数据安全措施依然在供应商控制之中的现状也没有改变。克服这些安全隐私问题的一个研究方向是基于加密技术。基本上,这种机制可提供一组可靠的第三方技术来确保用户数据免于受到云服务提供商或任何其他入侵者的攻击。这一方法不仅为用户提供了用以评估其个人数据和信息的安全性的工具,同时在对数据的控制力上也赋予了用户更多的权限。本论文研究了一种在移动云计算中数据存储和数据传输的安全解决方案和机制。该措施研究分析了云服务器及在其与客户端之间存储传输的数据的机密性,隐私性和完整性问题。为此,引入对称性与非对称性加密技术主要用于增强信息的安全性。在对该安全系统的分析研究的基础上,本文提出了一种可应用于实际中的安全机制设计方案,同时给出了此方案的原始模型并对其性能进行了评估。在本系统中,数据的机密性、保密性及完整性分别通过数据加密,数字签名和用户认证来确保安全实施。为对数据进行有效的加密,本文在使用对称性加密技术时做了一些细微的调整。即在对数据进行加密的过程中,为了确保数据及其加密密钥的安全性,同时对所使用的密钥也进行了加密。而在数字签名的过程中,使用的是非对称加密技术。同时,为进一步确保数据的安全完整,采用了MAC认证和Web认证这两种技术。本文所提出的安全系统核心思想是使所有加密操作都在客户端(移动客户端)上进行,这可为用户提供对其个人数据和个人信息安全性的更多控制和信任,因此数据不依赖于任何类型的服务器或供应商提供的安全解决方案和操作。测试的结果表明,解决方案在实践中是切实可行。

关键词：云计算密码系统安全

Acute paroxysmal cold hemoglobinuria upon dengue fever:A case report

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Journal of Acute Disease 2024年第3期13卷 121-124页

作者： Momin Majed abdul basit Aluri Anamika Syed Arfa Ashrafunnisa Rahul Dev Singh Rathore Department of Laboratory Medicine Yashoda HospitalHyderabadIndia Department of Pediatrics and Neonatology Yashoda HospitalHyderabadIndia

Rationale:Dengue fever is capable of inciting the formation of transient polyclonal antibodies directed at red blood cell antigens,resulting in complement-mediated hemolysis,leading to intravascular hemolysis and ***’s concern:A 12-year-old male patient who recovered from dengue fever a week ago had red blood cell agglutination,spherocytes,and engulfment of red blood cells(erythrophagocytosis)by monocytes and neutrophils on routine hematological peripheral blood *** unexpected blood smear results prompted the lab physicians to investigate autoimmune hemolytic anemia,which revealed a monospecific positive direct antiglobulin test for complement(C3d,C3b)and the presence of Donath-Landsteiner ***:Paroxysmal cold hemoglobinuria(PCH),secondary to dengue ***:Oxygen supplements,antibiotics,intravenous immunoglobulins,steroid therapy,and packed cell transfusions were ***:The patient’s condition was improved following the ***:Post-dengue PCH is a rare complication that requires a thorough peripheral smear examination for erythrophagocytosis,as advanced hematology analyzers fail to detect such findings.

关键词： Paroxysmal cold hemoglobinuria Dengue Erythrophagocytosis Donath-Landsteiner test Treatment

Cognitive frequency diverse array radar with symmetric non-uniform frequency offset

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Science China(Information Sciences) 2016年第10期59卷 194-209页

作者： abdul basit Ijaz Mansoor QURESHI Wasim khan Aqdas Naveed MALIK Department of Electronic Engineering International Islamic University Department of Electrical Engineering Air University Islamabad

Frequency diverse array(FDA) radar with uniform inter-element frequency offset generates a beam pattern with maxima at multiple range and angle values. Multiple maxima property allows interferers located at any of the maxima to affect the target-returns. As a result the signal to interference noise ratio(SINR) and probability of detection decreases. In this paper, we propose a cognitive uniformly-spaced FDA with non-uniform but symmetric frequency offsets to achieve a single maximum beam pattern at the target position. Moreover,these non-uniform frequency offsets are calculated using well known mu-law formulae. The design sharpens or broadens the transmitted beam pattern based on the receiver feedback to achieve a better detection probability and an improved SINR as compared to the previous designs. The performance is also analyzed by considering the Cramer-Rao lower bound(CRLB) on target angle and range estimation.

关键词： cognitive radar frequency diverse array non-uniform frequency offset range-angle beam forming

Spatio-temporal variations in trends of vegetation and drought changes in relation to climate variability from 1982 to 2019 based on remote sensing data from East Asia

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Journal of Integrative Agriculture 2023年第10期22卷 3193-3208页

作者： Shahzad ALI abdul basit Muhammad UMAIR Tyan Alice MAKANDA Fahim Ullah khan Siqi SHI NI Jian College of Chemistry and Life Sciences Zhejiang Normal UniversityJinhua 321004P.R.China Department of Agriculture Hazara UniversityMansehra 21120Pakistan Department of Computer Science University of PeshawarPeshawar 25000Pakistan Faculty of Geo-Information Science and Earth Observation(ITC) University of TwenteEnschede 7500 AENetherlands

Studying the significant impacts on vegetation of drought due to global warming is crucial in order to understand its dynamics and interrelationships with temperature,rainfall,and normalized difference vegetation index(NDVI).These factors are linked to excesses drought frequency and severity on the regional scale,and their effect on vegetation remains an important topic for climate change *** Asia is very sensitive and susceptible to climate *** this study,we examined the effect of drought on the seasonal variations of vegetation in relation to climate variability and determined which growing seasons are most vulnerable to drought risk;and then explored the spatio-temporal evolution of the trend in drought changes in East Asia from 1982 to *** data were studied using a series of several drought indexes,and the data were then classified using a heat map,box and whisker plot analysis,and principal component *** various drought indexes from January to August improved rapidly,except for vegetation health index(VHI)and temperature condition index(TCI).While these indices were constant in September,they increased again in October,but in December,they showed a descending *** seasonal and monthly analysis of the drought indexes and the heat map confirmed that the East Asian region suffered from extreme droughts in 1984,1993,2007,and 2012among the study *** distribution of the trend in drought changes indicated that more severe drought occurred in the northwestern region than in the southeastern area of East *** drought tendency slope was used to describe the changes in drought events during 1982–2019 in the study *** correlations among monthly precipitation anomaly percentage(NAP),NDVI,TCI,vegetation condition index(VCI),temperature vegetation drought index(TVDI),and VHI indicated considerably positive correlations,while considerably negative correlations were found among the three pairs of NDVI and VHI,TVDI and VHI,and NDV

关键词： climate change drought severity vegetation dynamics heat mapping TVDI spatial correlation East Asia

Baseline Isolated Printed Text Image Database for Pashto Script Recognition

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Intelligent Automation & Soft Computing 2023年第7期37卷 875-885页

作者： Arfa Siddiqu abdul basit Waheed Noor Muhammad Asfandyar khan M.Saeed H.Kakar Azam khan Department of Computer Science&Information Technology University of BalochistanQuetta87300Pakistan

The optical character recognition for the right to left and cursive languages such as Arabic is challenging and received little attention from researchers in the past compared to the other Latin ***,the absence of a standard publicly available dataset for several low-resource lan-guages,including the Pashto language remained a hurdle in the advancement of language *** that,a clean dataset is the fundamental and core requirement of character recognition,this research begins with dataset generation and aims at a system capable of complete language *** in view the complete and full autonomous recognition of the cursive Pashto *** first achievement of this research is a clean and standard dataset for the isolated characters of the Pashto *** this paper,a database of isolated Pashto characters for forty four alphabets using various font styles has been *** order to overcome the font style shortage,the graphical software Inkscape has been used to generate sufficient image data samples for each *** dataset has been pre-processed and reduced in dimensions to 32×32 pixels,and further converted into the binary format with a black background and white text so that it resembles the Modified National Institute of Standards and Technology(MNIST)*** benchmark database is publicly available for further research on the standard GitHub and Kaggle database servers both in pixel and Comma Separated Values(CSV)formats.

关键词： Text-image database optical character recognition(OCR) pashto isolated characters visual recognition autonomous language understanding deep learning convolutional neural network(CNN)

Probing nutritional and functional properties of salted noodles supplemented with ripen Banana peel powder

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Food Production, Processing and Nutrition 2022年第1期4卷 249-258页

作者： Imran Pasha abdul basit Muhammad Ahsin Farah Ahmad National Institute of Food Science and Technology Faculty of Food Nutrition and Home SciencesUniversity of AgricultureFaisalabad38000Pakistan

Banana peel is appreciated for higher dietary fiber, phenolics, flavonoid contents, and minerals (particularly iron, calcium, and potassium), despite being a waste product. After drying, it can be processed into powder/flour to be combined with wheat flour (WF) for development of value-added products. In this study, we substituted WF with banana peel powder (BPP) at supplementation rates of 5, 10, and 15%, and evaluated their suitability to develop salted noodles. The results showed that the composite flour with 15% BPP had significantly higher protein, ash, and crude fiber content as compared to control. Higher antioxidant capacity was observed in composite flour noodles: total phenolics content (TPC), total flavonoid content (TFC), ferric reducing power (FRAP) and DPPH reducing power were increased up to 278, 260, 143 and 13 percent respectively in the noodles containing 15% BPP as compared to control (100% WF). On the other hand, values for viscosity decreased up to 22% with addition of BPP in WF. Furthermore, water absorption capacity and cooking losses were increased up to 15 and 13 percent respectively with 15% BPP incorporation in WF. Results for sensory evaluation demonstrated that noodles with 10% BPP scored highest for sensory profile.

关键词： Banana peel Noodles Bioactive compounds Pasting properties Waste utilization

Phase Time for the Tunneling of Ultracold V-Type Atoms Through a Mazer Cavity

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Communications in Theoretical Physics 2019年第5期71卷 610-616页

作者： Fazal Badshah abdul basit Hamad Ali Qing He Guo-Qin Ge School of Physics Huazhong University of Science and Technology Quantum Optics Lab.Department of Physics COMSATS University Islamabad College of Science Zhongyuan University of Technology

We study the tunneling time of ultracold V-type atoms interacting a high quality microwave cavity. Here atomic coherence is introduced in the system by a strong driving field which couples the two lower states of the three-level atom. It is found that in the presence of coherence, mazer action or the scattering like nature of the interaction may be examined for extended energies of the incident cold atoms. Our results show that position and amplitudes of the peak values of the phase time(traversal time) may be very effectively controlled by the coherent driving field. Further, here we obtained superclassical values of the phase time corresponding to much higher values of the transmission amplitudes of the tunneling atoms which may be advantageous in the possible experimental realization of the superclassical tunneling time of the traversing cold atoms. In addition, we examine a mirror reflection type symmetry in the phase time curve for a judicious choice of the external driving field.

关键词： ultracold atoms mazer cavity phase time superclassicality

Synthesis,Characterization,Biological and Docking Simulations of 4-(Benzylideneamino) Benzoic Acids

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Chinese Journal of Structural Chemistry 2021年第3期40卷 291-300,271页

作者： HAMID Aziz AAMER Saeed FARUKH Jabeen abdul basit IRFAN Zia Qureshi abdul Aziz ATIF Haroon ASHFAQ Ur Rehman Department of Chemistry Quaid-I-Azam University Islamabad 45320 Pakistan Computation ScienceResearch and Development Organization14012485 Hurontraio StreetMississaugaONCaL5A2G6 Department of Biology Laurentian University935 Ramsey Lake RoadSudburyONCanada P3E2C6 Department of Animal Sciences Quaid-I-Azam University Islamabad 45320 Pakistan Department of Microbiology Quaid-I-Azam University Islamabad 45320 Pakistan Department of Biochemistry Shankar CampusAbdul Wali Khan UniversityMardan 23200Khyber PukhtoonkhwaPakistan Department of Bioinformatics and Biostatistics Shanghai Jiaotong UniversityShanghai 200240China

The present research paper presents the synthesis, characterization, biological and computational studies of 4-(benzylideneamino) benzoic acid derivatives(3a~3g). Derivatives 3a~3c displayed best antidiabetic potential with a glucose-lowering effect compared to the reference drug Glibenclamide. Biochemical parameters including plasma glucose, serum triglycerides, cholesterol, alanine amino transferase and aspartate amino transferase levels showed significant alterations in concentrations relative to the control. Similarly, the derivatives 3a, 3d and 3e displayed potent in vitro antibacterial potential. Molecular docking simulations delineated that the ligands and complexes were stabilized at the active site by electrostatic and hydrophobic forces, consistent with the corresponding experimental results. In silico study of the binding pattern predicted that the synthesized ligands, 3d and 3a could serve as a potential surrogate for hit-to-lead generation and the design of novel antibacterial drugs.

关键词： antidiabetic biochemical cholesterol glibenclamide simulations

Machine Learning-based Stable P2P IPTV Overlay

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Computers, Materials & Continua 2022年第6期71卷 5381-5397页

作者： Muhammad Javid Iqbal Ihsan Ullah Muhammad Ali Atiq Ahmed Waheed Noor abdul basit Directorate of Information Technology Sardar Bahadur Khan Women’s UniversityQuettaPakistan Department of Computer Science and Information Technology University of BalochistanQuettaPakistan

Live video streaming is one of the newly emerged services over the Internet that has attracted immense interest of the service *** Internet was not designed for such services during its inception,such a service poses some serious challenges including cost and ***-to-Peer(P2P)Internet Protocol Television(IPTV)is an application-level distributed paradigm to offer live video *** terms of ease of deployment,it has emerged as a serious alternative to client server,Content Delivery Network(CDN)and IP multicast ***,P2P approach has struggled to provide the desired streaming quality due to a number of *** of peers in a network is one of themajor issues among *** of the existing approaches address this issue through older-stable *** paper first extensively investigates the older-stable principle to observe its validity in different *** is observed that the older-stable principle does not hold in several of ***,it utilizes machine learning approach to predict the stability of *** work evaluates the accuracy of severalmachine learning algorithms over the prediction of stability,where the Gradient Boosting Regressor(GBR)out-performs other ***,this work presents a proof-of-concept simulation to compare the effectiveness of older-stable rule and machine learning-based predictions for the stabilization of the *** results indicate that machine learning-based stability estimation significantly improves the system.

关键词： P2P IPTV live video streaming user behavior overlay networks stable peers machine learning