Yazar "Köse, Büşra Özdenizci" seçeneğine göre listele

Listeleniyor 1 - 3 / 3
  • Küçük Resim Yok
    Öğe
    Blockchain Tabanlı Bir Veri Yönetim Modeli
    (M. Hanefi CALP, 2019) Alsadi, Mohammed; Gülseçen, Sevinç; Kara, Sinan; Köse, Büşra Özdenizci; Coşkun, Vedat
    gibi yeteneklerin kazandırılması ve nesnelerin birbiri ile iletişim kurabilmesine olanak sağlamaktadır. Akıllı nesne kaynaklarının ve iletişim ağ yeteneklerinin gelişimiyle, çeşitli akıllı ortamlar –sağlık, şebeke, ev, fabrika, tarım, şehir, araçlar, ulaşım ve benzeri-  hızla gelişmektedir. Bu kapsamda, IoT sistemlerinde işlenecek verilerin ve gerçekleştirilecek işlemlerin güvenliği ve gizliliği oldukça önemli bir konudur. Çalışmamızın amacı, mevcut ulaşım ve araç ekosisteminin reddedilemezlik ve mutabakat sağlama güvenlik gereksinimleri karşılamayı sağlayacak, aynı zamanda akıllı ulaşım ve bağlantılı araç IoT ekosistemlerinin gelişimini destekleyecek, Blockchain teknolojisine dayalı bir güvenli veri yönetim modeli ortaya koymaktır. Önerilen modelde, IoT sistemlerinin kısıtlarını göz önünde bulunduran ve akıllı ulaşım endüstrisindeki gelişmelere bağlı olarak, yeni nesil akıllı araç kitleri ile entegre çalışabilen güvenli, etkin ve yenilikçi bir altyapı sağlanacaktır.
  • Küçük Resim Yok
    Öğe
    Development of a SIM Card based Key Management System
    (2020) Köse, Büşra Özdenizci; Coşkun, Vedat; Mantar, Hacı Ali; Çevikbaş, Cem
    Today, almost all applications running on the smartphone provide valuable and sensitive transactions on user’s private data such as identity data, credit card details, payment data, location data and so on. Service providers are trying to increase the efficiency of their applications and to improve the compatibility of security mechanisms through SIM (Subscriber Identity Module) cards owned by Mobile Network Operators (MNOs). In this sense, there is an urgent need for a centralized secure key management service. Thanks to the strong security infrastructure created by card manufacturers during design and the robust security procedures applied by MNOs; SIM cards have significant potential to provide the required secure environment for service providers. Accordingly, a novel centralized SIM card based key management framework called SIM-GAYS is designed and developed to facilitate centralized cryptographic operations of diverse mobile applications provided by service providers. This paper aims to present and demonstrate the essential development results of SIM-GAYS. The functional requirements of the SIM-GAYS are tested depending on developed scenarios. The results showed that the designed and developed APDU (Application Protocol Data Unit) transmission method between SIM card and smartphone, and secure storage of the keys by the Master Key (owned by SIM-GAYS) support almost all cryptographic services provided by SIM-GAYS framework.
  • Küçük Resim Yok
    Öğe
    Protecting Mobile Service User Identity by Adding Additional Security Layer
    (2021) Erdemir, Utku; Coşkun, Vedat; Buk, Onur; Mantar, Hacı Ali; Köse, Büşra Özdenizci
    Today, various common identity systems (e.g. Facebook Login, Google Connect, Apple ID) are used to improve operational efficiency for service providers and provide an easier authentication method in web or mobile services for users. Almost all common identity systems focus on delivering seamless user experience while proving user identity securely to the service provider. In particular, the use of common identity systems with a high security level is becoming a more important requirement on smartphones. In this context, MNOs (Mobile Network Operators) are considered as an important actor in providing common identity services, as they have strong GSM capabilities. Currently, it is possible to see many identity management solutions -based on OpenID Connect and Mobile Connect standards- from MNOs which are used for authentication in mobile applications of service providers. However, existing solutions generally does not provide very high level of assurance in the asserted digital identity. With advancements in value-added mobile services and increasing security requirements; there is a need for common identity systems that provide higher levels of assurance (i.e., particularly LoA4), strong authentication and non-repudiation services for service providers and users. This study presents the development and implementation of a multi-factor authentication method for mobile services based on Mobile Connect and OpenID Connect standards. The designed model includes the usage of three identity -knowledge, ownership, biometric- factors of user in order to access sensitive mobile services on the smartphone. The system development and testing studies were systematically presented based on the functional requirements. The realization and deployment of the proposed model by MNOs could play an important role in the development of mobile services that require a high level of assurance in the future.