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Number of results: 4
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Abstract

With the increasing uses of internet technologies in daily life, vulnerability of personal data/information is also increasing. Performing secure communication over the channel which is insecure has always been a problem because of speedy development of various technologies. Encryption scheme provides secrecy to data by enabling only authorized user to access it. In the proposed paper, we present an encryption algorithm designed for data security based on bilinear mapping and prove it secure by providing its security theoretical proof against adaptive chosen cipher-text attack. With the help of a lemma, we have shown that no polynomially bounded adversary has non-negligible advantage in the challenging game. We also give the comparative analysis of the proposed scheme in terms of security and performance with Deng et al., 2020 and Jiang et al., 2021 schemes and prove that proposed algorithm is more efficient and secure than others existing in literature against adaptive chosen cipher-text attack.
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Authors and Affiliations

Vandani Verma
1
Pragya Mishra
1

  1. Amity Institute of Applied Sciences, Amity University, Noida-125 (Uttar Pradesh), India
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Abstract

This work suggests a brand-new 1*4 two-dimensional demultiplexer design based on multicore photonic crystal fiber. Numerical models show that the optical signals can be separated in a photonic crystal fiber construction using optical signals with wavelengths of 0.85, 1.1, 1.19, and 1.35 μm injected on the center core and separated into four cores. The innovative design switches different air-hole positions using pure silica layers throughout the length of the fiber to regulate the direction of light transmission between layers.
Wavelength demultiplexers are essential parts of optical systemic communications. They serve as a data distributor and can use a single input to produce multiple outputs. The background material is frequently natural silica, and air holes can be found anywhere throughout the length of the fiber as the low-index components.
The simulation results showed that after a 6 mm light propagation, the four-channel demux can start to demultiplex.
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Authors and Affiliations

Assia Ahlem Harrat
1
Mohammed Debbal
1
Mohammed Chamse Eddine Ouadah
2

  1. Department of Electronics and Telecommunications, Faculty of Science and Technology, University of Belhadj Bouchaib, Algeria
  2. Department of Telecommunications, Faculty of Electrical and Computer Engineering, University of Mouloud Mammeri, Algeria
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Abstract

Bovine tuberculosis (BTB) in sheep (Ovis aries) is caused by Mycobacterium bovis and Mycobacterium caprae. Even though sheep have been considered less sensitive to BTB than other ruminants, they have been subject to increasing numbers of tuberculosis cases and it has been suggested that they may act as a disease reservoir in some regions. Aim of the study: Following a report of tuberculous-like gross lesions (repeated cases of purulent or caseous lymphadenitis and a single case of serosal tubercles on the peritoneum) from veterinarians working in a slaughterhouse in the Małopolskie Voivodeship, southern Poland, the aim of this study was to conduct ante-mortem BTB diagnostics in three flocks with suspected BTB. The animals for testing were selected randomly from the flocks; a blood sample for interferon-γ release assay (IGRA) and a single tuberculin skin test (TST) was performed on each sheep. All TST results were negative. The IGRA result was positive in two ewes from the same flock (four and five years of age); these two sheep were tested microbiologically using Stonebrink and Löwenstein-Jensen media. No gross lesions suggesting BTB were observed, and the culture results were negative. Based on the positive IGRA results, together with its high specificity in sheep, and the potential risk to humans posed by consuming local unpasteurized dairy products, we recommend introducing serological BTB screening in sheep from this area, and subjecting the positive results to confirmation by culture.
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Authors and Affiliations

A. Didkowska
1
P. Żmuda
2
B. Orłowska
1
M. Nowak
1
K. Filip-Hutsch
1
K. Cuper
1
M. Krajewska-Wędzina
3
K. Anusz
1

  1. Department of Food Hygiene and Public Health Protection, Institute of Veterinary Medicine, Warsaw University of Life Sciences (SGGW), Nowoursynowska 166, 02-787 Warsaw, Poland
  2. University Centre of Veterinary Medicine UJUR, Al. Mickiewicza 24/28, 30059 Kraków, Poland
  3. Department of Microbiology, National Veterinary Research Institute, Partyzantów 57, 24-100 Puławy, Poland

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