Master Degree / Yüksek Lisans Tezleri
Permanent URI for this collectionhttps://hdl.handle.net/11147/3008
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Master Thesis Blockchain Based Context Aware Access Control Structure Implementation for Security of Internet of Things System(01. Izmir Institute of Technology, 2022) Erten, Yusuf Murat; Demirörs, Onur; Kul, Aslı; Demirörs, Onur; Erten, Yusuf Murat; 03.04. Department of Computer Engineering; 01. Izmir Institute of Technology; 03. Faculty of EngineeringNowadays, Internet of Things (IoT) devices, which have started to be included in our lives with the developing technology, are one of the popular working topics. While they are a means of transporting many important data in terms of usage areas, IoT devices have brought security concerns due to their being a new technology and technical limitations. The use of standard access control algorithms is insufficient for IoT environments due to their complexity and dynamism. In this study, considering the importance of sensitive critical data carried by IoT environments, Context Aware IoT Rule Based Access Control Algorithm, which is a proposed algorithm to ensure the security of interaction with IoT environments, is aimed to be integrated and used to create a reliable IoT environment by taking advantage of the security promising Blockchain technology. It is due to the use of distributed and cryptography methods that are widely used today.Master Thesis Blackhole Attacks in Iot Networks(01. Izmir Institute of Technology, 2020) Sokat, Barış; Erten, Yusuf Murat; Ayav, Tolga; Sokat, Barış; Ayav, Tolga; Erten, Yusuf Murat; 01. Izmir Institute of Technology; 03.04. Department of Computer Engineering; 03. Faculty of EngineeringIoT technologies are very popular today, and they are used in almost every field. Therefore, the number of IoT devices used is increasing day by day. Like every field in computer networks, security is quite important in IoT networks. However, the resource-constrained nature of IoT devices makes the study of security measures for IoT networks very challenging. In the literature research conducted before this thesis study, it was seen that it can perform a wide variety of RPL-based attacks on IoT networks. One of these attacks is the blackhole attack. Although the black hole attack is functionally simple, the damage it causes in the network can be extremely destructive. As far as it is known, in addition to the limited number of studies in this field of attack, the black hole attack used in the studies in this field has also basic features. The basic feature mentioned here is that the attacker node that will perform a black hole attack drops all the packets that come to it. When the attacker node drops all incoming packets, it causes the topology to change in the network, the number of control messages to increase and the attacker node to be isolated from the network in a short time. However, blackhole attack can be combined with different attacks. Therefore, in this thesis, the node that will perform the black hole attack is designed to allow control messages to pass, while dropping all other packets. Here, it is aimed that the attacker node remains on the network for a longer time. As a result, as long as the attacker node is active, it will be able to drop more packets and the number of control messages in the network will be controlled since the topology does not change. With the black hole attack developed as a result of the simulation tests, the number of control messages released in the network was taken under control and it was observed that the attacker node could remain in the network throughout the simulation period. Thus, the effect of different types of black hole attacks on the network that can be developed has been revealed.Master Thesis Internet of things simulation using cisco packet tracer(01. Izmir Institute of Technology, 2020) Thera, David; Erten, Yusuf Murat; Ayav, Tolga; Ayav, Tolga; Erten, Yusuf Murat; 03.04. Department of Computer Engineering; 03. Faculty of Engineering; 01. Izmir Institute of TechnologyNowadays, the term IoT (internet of things) have become extremely important in our life. This technology is used in many fields such as education, health, industries, agriculture and infrastructures. In order to learn and understand how this technology works, many practical learning tools are used. The aim of the thesis is to introduce a iot simulation tool, where student can simulate or build and manage the systems for better understanding of the philosophy behind iot networks. The tool used is Cisco packet tracer which is a software developed by Cisco that is used to create and simulate a virtual network, basically a wireless network, without the need for any network hardware. The tool is free of charge, and suitable to work with almost all the operating systems. Cisco packet tracer allows users to have a practical networking technology knowledge. In this thesis, "Cisco packet tracer" is used to design an internet-based home automation system or smart home.