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    Wyświetlanie 1-8 z 8
    Tytuł:
    ID-based, Proxy, Threshold Signature Scheme
    Autorzy:
    Pomykała, Jacek
    Kułakowski, Henryk
    Sapiecha, Piotr
    Grela, Błażej
    Powiązania:
    https://bibliotekanauki.pl/articles/1844644.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ID-based
    proxy
    threshold
    signature
    scheme
    Opis:
    We propose the proxy threshold signature scheme with the application of elegant construction of verifiable delegating key in the ID-based infrastructure, and also with the bilinear pairings. The protocol satisfies the classical security requirements used in the proxy delegation of signing rights. The description of the system architecture and the possible application of the protocol in edge computing designs is enclosed.
    Źródło:
    International Journal of Electronics and Telecommunications; 2021, 67, 2; 201-205
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Efficient Data Transmission in VANET Using Clustering Method
    Autorzy:
    Suganthi Evangeline, C.
    Appu, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/227295.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    VANET
    RSU
    2-layer stable clustering scheme
    Opis:
    A special type of Mobile Ad-hoc Networks (MANETs) which has frequent changes of topology and higher mobility is known as Vehicular Ad-hoc Networks (VANETs). In order to divide the network into groups of mobile vehicles and improve routing, data gathering, clustering is applied in VANETs. A stable clustering scheme based on adaptive multiple metric combining both the features of static and dynamic clustering methods is proposed in this work. Based on a new multiple metric method, a cluster head is selected among the cluster members which is taken from the mobility metrics such as position and time to leave the road segment, relative speed and Quality of Service metrics which includes neighborhood degree, link quality of the RSU and bandwidth. A higher QoS and cluster stability are achieved through the adaptive multiple metric. The results are simulated using NS2 and shows that this technique provides more stable cluster structured with the other methods.
    Źródło:
    International Journal of Electronics and Telecommunications; 2017, 63, 3; 309-313
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improving Security of Existentially Unforgeable Signature Schemes
    Autorzy:
    Jurkiewicz, Mariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/225969.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    digital signature scheme (DSS)
    strongly unforgeable DSS
    pairing
    Opis:
    In this paper we present a family of transforms that map existentially unforgeable signature schemes to signature schemes being strongly unforgeable. In spite of rising security, the transforms let us make a signature on a union of messages at once. The number of elements in this union depends on the signing algorithm of a scheme being transformed. In addition to that we define an existentially unforgeable signature scheme based on pairings, which satisfies all assumptions of the first part and is able to be subjected to transformation.
    Źródło:
    International Journal of Electronics and Telecommunications; 2020, 66, 3; 473-480
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Subcarrier Filtering For Spectrally Efficient Multicarrier Modulation Schemes and Its Impact on PAPR: A Unified Approach
    Autorzy:
    Shanbhag, Kiran V.
    Sathish, Dayakshini
    Powiązania:
    https://bibliotekanauki.pl/articles/27311957.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    OFDMA
    PAPR
    subcarrier filtering
    MCM scheme
    spectral efficiency
    prototype filter
    Opis:
    Multicarrier modulation (MCM) based schemes have been a major contributing factor in revolutionizing cellular networks due to their ability to overcome fading. One of the popular scheme orthogonal frequency division multiple access (OFDMA), having been part of 4G, is also adapted as part of 5G enhanced mobile broadband (eMBB). Though it has several advantages, spectral efficiency (SE) and peak to average power ratio (PAPR) have been two major concerns which have attracted lot of attention resulting in proposals of several other MCM schemes. But most of these studies have treated the two issues independently. This paper in particular studies the subcarrier filtering approach to improve the spectral efficiency of MCM scheme and its impact on the overall PAPR of such schemes. The analysis shows that the PAPR improvement is also achieved by such filters meant for spectral confinement and the simulation results validate the same provoking.
    Źródło:
    International Journal of Electronics and Telecommunications; 2023, 69, 4; 785--791
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Overcoming Localization Errors due to Node Power Drooping in a Wireless Sensor Network
    Autorzy:
    Khan, S. A.
    Daachi, B.
    Djouani, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/226280.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wireless sensor networks
    RSSI
    localization
    range-free scheme
    energy considerations
    neural networks
    Opis:
    Received Signal Strength Indication (RSSI) plays a vital role in the range-free localization of sensor nodes in a wireless sensor network and a good amount of research has been made in this regard. One important factor is the battery voltage of the nodes (i.e., the MICAz sensors) which is not taken into account in the existing literature. As battery voltage level performs an indispensable role for the position estimation of sensor nodes through anchor nodes therefore, in this paper, we take into a account this crucial factor and propose an algorithm that overcomes the problem of decaying battery. We show the results, in terms of more precise localization of sensor nodes through simulation. This work is an extension to [1] and now we also use neural network to overcome the localization errors generated due to gradual battery voltage drooping.
    Źródło:
    International Journal of Electronics and Telecommunications; 2011, 57, 3; 341-346
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the Evaluation of Handover Exchange Schemes Between Two Cognitive Radio Base Stations with and without Buffers
    Autorzy:
    Esenogho, E.
    Mambou, E. N.
    Ferreira, H. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/226444.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cognitive radio networks
    channel handover exchange scheme
    blocking probability
    force termination
    handover failure
    Opis:
    This article investigates and evaluates a handover exchange scheme between two secondary users (SUs) moving in different directions across the handover region of neighboring cell in a cognitive radio network. More specifically, this investigation compares the performance of SUs in a cellular cognitive radio network with and without channel exchange scheme. The investigation shows reduced handover failure, blocking, forced and access probabilities respectively, for handover exchange scheme with buffer as compared to exchange scheme without buffer. It also shows transaction within two cognitive nodes within a network region. The system setup is evaluated through system simulation.
    Źródło:
    International Journal of Electronics and Telecommunications; 2018, 64, 4; 513-518
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of the Stability and Convergence of Difference Schemes for the Three-dimensional Equations of the Atmospheric Boundary Layer
    Autorzy:
    Temirbekov, A. N.
    Urmashev, B. A.
    Gromaszek, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/226826.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    atmospheric boundary layer equations
    difference scheme
    approximation error
    stability
    convergence algorithms
    numerical solution
    Opis:
    In this article we construct a finite-difference scheme for the three-dimensional equations of the atmospheric boundary layer. The solvability of the mathematical model is proved and quality properties of the solutions are studied. A priori estimates are derived for the solution of the differential equations. The mathematical questions of the difference schemes for the equations of the atmospheric boundary layer are studied. Nonlinear terms are approximated such that the integral term of the identity vanishes when it is scalar multiplied. This property of the difference scheme is formulated as a lemma. Main a priori estimates for the solution of the difference problem are derived. Approximation properties are investigated and the theorem of convergence of the difference solution to the solution of the differential problem is proved.
    Źródło:
    International Journal of Electronics and Telecommunications; 2018, 64, 3; 391-396
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Binary Tree Based Forward Secure Signature Scheme in the Random Oracle Model
    Autorzy:
    Jurkiewicz, Mariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/2055214.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    forward secure digital signature scheme
    bilinear pairing of Type 3
    random oracle model
    bilinear Diffie-Hellman inversion problem
    Opis:
    In this paper we construct and consider a new group-based digital signature scheme with evolving secret key, which is built using a bilinear map. This map is an asymmetric pairing of Type 3, and although, for the reason of this paper, it is treated in a completely abstract fashion it ought to be viewed as being actually defined over E(Fqn )[p] × E(Fqnk )[p] → Fqnk [p]. The crucial element of the scheme is the key updater algorithm. With the adoption of pairings and binary trees where a number of leaves is the same as a number of time periods, we are assured that an updated secret key can not be used to recover any of its predecessors. This, in consequence, means that the scheme is forward-secure. To formally justify this assertion, we conduct analysis in fu-cma security model by reducing the security of the scheme to the computational hardness of solving the Weak ℓ-th Bilinear Diffie-Hellman Inversion problem type. We define this problem and explain why it can be treated as a source of security for cryptographic schemes. As for the reduction itself, in general case, it could be possible to make only in the random oracle model.
    Źródło:
    International Journal of Electronics and Telecommunications; 2021, 67, 4; 717--726
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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