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  • Supporting Videos of plastron bursting of the DCP- and PFPE-based coatings

    Description:
    Supporting Videos for the Master Thesis: Antifouling properties of plastron forming, ultra-porous, superhydrophobic DCP- and PFPE-based coatings by Georg Breilmann The Master Thesis was done in the Working Group Biointerfaces of Prof. Dr. Axel Rosenhahn in the Analytical Chemistry Chair, Faculty of Chemistry and Biochemistry Ruhr-Universität Bochum. The Videos show five different coatings after a static diatom attachment assay with the algae strain Navicula perminuta. The plastron forming samples were handled with a diving bell and were exposed for the first time after incubation to air. The bursting of the plastrons are presented in the Videos.
    Keyword:
    Antifouling, properties, plastron forming, ultra-porous, superhydrophobic , DCP-based, PFPE-based, coatings, and plastron bursting
    Subject:
    Analytical Chemistry and Master Thesis
    Publisher:
    Language:
    English
    Date Uploaded:
    2024-11-01
    Date Modified:
    2025-02-19
    License:
    Creative Commons CC0 1.0 Universal
    Resource Type:
    Audiovisual

  • LAT Hologramm Software 2.3

    Description:
    Diese Software dient zum Erstellen computergenerierter Hologramme für die holographische Strahlformung von Laserstrahlen mittels Spatial Light Modulator. Zudem unterstützt die Software die Ansteuerung und Synchronisation der Laborhardware. Version 2.3 der Hologrammsoftware, letzte Änderung 17.10.2024 and Die Software wurde für Experimente bzw. Simulationen mehrerer Veröffentlichungen eingesetzt, u.a. Marx, Jan, Felix Behlau, Damian Haske, Cemal Esen, und Andreas Ostendorf. „Two-Photon Polymerization Based Fabrication of Millimeter-Sized Precision Fresnel Optics“. Applied Optics 63, Nr. 24 (8. August 2024): 6495–6503.  https://doi.org/10.1364/ao.531069 Marx, Jan, Cemal Esen, Christian Lutz , Ralf Hellmann, und Andreas Ostendorf. „Holographic Tuning of Physical Axicons“. In LiM 2023 Proceedings. Hannover: Wissenschaftliche Gesellschaft Lasertechnik und Photonik e.V. (WLT), 2023.  https://wlt.de/sites/default/files/2023-09/Contribution_154.pdf. Marx, Jan, Christian Lutz, Ralf Hellmann, und Cemal Esen. „Holographic Multi-Spot Generation for Ultra-Short Pulse Bessel Beam Processing of Stainless Steel“. In 12th CIRP Conference on Photonic Technologies [LANE 2022], herausgegeben von M. Schmidt, F. Vollertsen, und B. M. Colosimo, 111:648–52. Amsterdam: Elsevier, 2022.  https://doi.org/10.1016/j.procir.2022.08.003
    Keyword:
    Hologram Calculation and Laboratory Control
    Publisher:
    Language:
    English and German
    Date Uploaded:
    2024-10-17
    Date Modified:
    2025-02-19
    License:
    MIT License
    Resource Type:
    Software

  • Identity Broker Analysis

    Description:
    Single Sign-On (SSO) is an authentication process that allows users to access multiple services with a single set of login credentials. Although SSO improves the user experience, it poses challenges to developers to implement complex authentication protocols securely. External services, called brokers, simplify the integration of SSO. In this paper, we shed light on the emerging brokered SSO ecosystem, focusing on the security of the newly introduced actor, the broker. We systematically evaluate the landscape of brokered SSO, uncovering significant blind spots in previous research. Our study reveals that 25% of the websites with SSO integrate brokers for authentication, an area that has not been covered by any previous research. Through our comprehensive security evaluation, we identify three categories of threats associated with brokered SSO: (1) insufficient validation of redirect chains enabling injection attacks, (2) unauthorized data access enabling account takeovers, and (3) violations of security best current practices. We expose vulnerabilities in over 50 brokers, compromising the security of more than 2k websites. These findings represent only a lower bound of a critical situation, underscoring the urgent need for improved security measures and protocols to safeguard the integrity of brokered SSO systems.
    Keyword:
    Single Sign-On and Identity Broker
    Subject:
    IT Security, Single Sign-On, Authorization and Authentication, and Identity Brokers
    Publisher:
    Language:
    English
    Date Uploaded:
    2024-10-02
    Date Modified:
    2025-02-19
    License:
    MIT License
    Resource Type:
    Dataset