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OALib Journal期刊

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A Review of Lightweight Cryptographic Schemes and Fundamental Cryptographic Characteristics of Boolean Functions  [PDF]
Nahla Fatahelrahman Ibrahim, Johnson Ihyeh Agbinya
Advances in Internet of Things (AIT) , 2022, DOI: 10.4236/ait.2022.121002
Abstract: In this paper, we survey a number of studies in the literature on improving lightweight systems in the Internet of Things (IoT). The paper illustrates recent development of Boolean cryptographic function Application and how it assists in using hardware such as the internet of things. For a long time there seems to be little progress in applying pure mathematics in providing security since the wide progress made by George Boole and Shannon. We discuss cryptanalysis of Boolean functions to avoid trapdoors and vulnerabilities in the development of block ciphers. It appears that there is significant progress. A comparative analysis of lightweight cryptographic schemes is reported in terms of execution time, code size and throughput. Depending on the schemes and the structure of the algorithms, these parameters change but remain within reasonable values making them suited for Internet of things applications. The driving force of lightweight cryptography (LWC) stems mainly from its direct applications in the real world since it provides solutions to actual problems faced by designers of IoT systems. Broadly speaking, lightweight cryptographic algorithms are designed to achieve two main goals. The first goal of a cryptographic algorithm is to withstand all known cryptanalytic attacks and thus to be secure in the black-box model. The second goal is to build the cryptographic primitive in such a way that its implementations satisfy a clearly specified set of constraints that depend on a case-by-case basis.
Self-Medication with Analgesics: Knowledge and Attitudes of Senior Medical Students and Interns at King Abdulaziz University, Jeddah, Saudi Arabia
Banan Mohamed Alamoudi,Nahla Khamis Ibrahim
- , 2018, DOI: 10.9734/JPRI/2018/39245
Abstract:
Reproductive health profile and circumcision of females in the Hali semi-urban region, Saudi Arabia: A community-based cross-sectional survey
Hussain Mohammed Albar,Nahla Khamis Ibrahim,Waleed Abdullah Milaat
- , 2018, DOI: 10.5144/0256-4947.2018.81
Abstract: Improving the reproductive health of females has become the focus of the developmental efforts of many nations
Effect of Polymer Blend on Diltiazem HCl Matrix Tablets Prepared by Direct Compression
Ibrahim M. El-Bagory,Nahla Brakat,Mahmoud El-Badry,,Mohamed A. Ibrahim
Journal of Pharmaceutical Science and Technology , 2010,
Abstract: The deformation mechanism of pharmaceutical powders, used in formulating directly compressed matrix tablets, affects the characteristics of the formed tablets. Three polymers of different deformation mechanisms were tested for their impact on Deltiazem (DZ) directly compressed tablets namely Kollidon SR (KL SR, plastic deformation), Ethylcellulose (EC, elastic deformation) and Carnauba wax (CW, brittle deformation) at different compression forces. However, tablets based mainly on KL SR, the plastically deformed polymer (DZ1) exhibited the highest hardness values compared to the other formulae which based on either blends of KL SR with CW, the very brittle deformed polymer. The upper detected force for DZ formulae and the lower punch force were found to dependent mainly on the powder deformation. This difference is attributed to the work done during the compression phase as well as the work lost during the decompression phase. Furthermore, the release profiles of DZ from formulae DZ 2 and DZ 4 that based on the composition (2KL SR: 1EC) and (1KL SR: 2EC), respectively, were consistent with different deformation mechanisms of KL SR and EC and on the physicochemical properties like the water absorptive capacity of EC. Upon increasing the weight ratio of KL SR(DZ), the release rate was greatly retarded.
Slow-release fluoride devices: a literature review
Pessan, Juliano Pelim;Al-Ibrahim, Nahla Saleh;Buzalaf, Marília Afonso Rabelo;Toumba, Kyriacos Jack;
Journal of Applied Oral Science , 2008, DOI: 10.1590/S1678-77572008000400003
Abstract: although the prevalence of caries has decreased dramatically over the past decades, it has become a polarised disease, with most of subjects presenting low caries levels and few individuals accounting for most of the caries affected surfaces. thus it become evident for the need of clinical approaches directed at these high-risk patients, in order to overcome problems related to compliance and low attendance at dental care centres. slow-release fluoride devices were developed based on the inverse relationship existing between intra-oral fluoride levels and dental caries experience. the two main types of slow-release devices - copolymer membrane type and glass bead - are addressed in the present review. a substantial number of studies have demonstrated that these devices are effective in raising intra-oral f concentrations at levels able to reduce enamel solubility, resulting in a caries-protective effect. studies in animals and humans demonstrated that the use of these devices was able to also protect the occlusal surfaces, not normally protected by conventional fluoride regimens. however, retention rates have been shown to be the main problem related to these devices and still requires further improvements. although the results of these studies are very promising, further randomised clinical trials are needed in order to validate the use of these devices in clinical practice. the concept of continuously providing low levels of intra-oral fluoride has great potential for caries prevention in high caries-risk groups.
Molecular Cloning, Characterization and Overexpression of a Novel Cyclin from Leishmania mexicana
Nahla O.M. Ali,Muntaser E. Ibrahim,Karen M. Grant,Jeremy C. Mottram
Pakistan Journal of Biological Sciences , 2010,
Abstract: We are reporting here, the cloning and characterization of the first cyclin from Leishmania mexicana. We have identified a cyclin-like motif from the L. major genome sequencing project. A cyclin homologue was cloned and sequenced from L. mexicana genome and it showed 96.1% amino acid identity with the putative L. major cyclin. It has also sequence identity to mitotic cyclins from other organisms. Southern analysis showed that it is present as a single copy gene. CYCa has been over-expressed in E. coli as a histidine fusion and western blot has confirmed the immunoreactive property of the recombinant cyclin, which then used to reconstitute active recombinant L. mexicana CRK3. No phosphorylation of histone HI was detected by both wild type and mutated CRK3 on the activation assays suggesting that phosphorylation status and cyclin binding are important for reconstituting protein kinase activity. The results confirm that we have isolated a cyclin molecule from L. mexicana (LmCYCa) which may play an important role in the regulation of the parasite cell cycle.
Five-year epidemiological trends for chemical poisoning in Jeddah, Saudi Arabia
Ali Hassan Alqahtani,Mohammed Abdel Elnour,Nahla Khamis Ibrahim,Sami Hamdan Alzahrani
- , 2017, DOI: 10.5144/0256-4947.2017.282
Abstract: Poisoning is a significant global public health challenge in terms of morbidity and mortality. We conducted this study because of the lack of large population-based studies on chemical poisoning in Saudi Arabia
Wet Cupping Reduces Pain and Improves Health-related Quality of Life Among Patients with Migraine: A Prospective Observational Study
Abdullah Kaki,Mohsen Abdul Elalah,Mourad Samiha,Nahla Ibrahim,Rohaiem Sawsan,Soad Al Jaouni
- , 2019, DOI: 10.5001/omj.2019.21
Abstract: To determine the benefits of wet cupping on pain and health-related quality of life (HRQOL) in adult patients with migraine headaches
Quality of Life of asthmatic children and their caregivers
Maha Alhainiah,Maie Khayat,Nahla Khamis Ibrahim,Orjwan Abulaban,Osama Felmban,Sarah Almaghrabi
- , 2019, DOI: 10.12669/pjms.35.2.686
Abstract: To assess Quality of Life (QOL), and its associated factors between asthmatic children and their caregivers, and determine the correlation between QOL of patients and caregivers, at King Abdulaziz University Hospital (KAUH), Jeddah
Cross-sectional correlates of increased IL-18 but reduced fetuin-A and oxytocin with adiposity and blood indices in metabolic syndrome patients with and without prediabetes
Amal Akour,Esraa Shawakri,Ibrahim Al-Sarraf,Jameel Bzour,Nahla Khawaja,Randa Naffa,Violet Kasabri
- , 2018, DOI: 10.1177/2042018818788802
Abstract: Oxytocin (OXT), fetuin-A and interleukin-18 (IL-18) are involved in the development and progression of metabolic syndrome (MetS) and prediabetes (pre/T2DM)
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