Master Degree / Yüksek Lisans Tezleri

Permanent URI for this collectionhttps://hdl.handle.net/11147/3008

Browse

Filters

2020 - 20223

Settings

Subject: search.filters.subject.BlockchainWoS Q: search.filters.wosQuartile.N/A

Search Results

Now showing 1 - 3 of 3
  • Master Thesis
    The Realization of a Blockchain-Based E-Voting Solution With a New Consensus Algorithm
    (01. Izmir Institute of Technology, 2022) Karaçay, Mustafa; Şahin, Serap
    Security and transparency issues in the paper-based voting system and technological advances popularized e-voting systems. Many academic research and industrial solutions have recently been proposed, designed, and implemented with a Homomorphic Cryptography Scheme or HTTPS. However, there is a new popular player in the game which is called blockchain technology. This study analyzes the requirements of a welldesigned e-voting system and the technology behind the blockchain, and proposes an e-voting system with a novel consensus algorithm. Different strategies are designed and implemented to satisfy all requirements. First, RSA and Paillier Homomorphic Cryptosystem are applied to meet requirements such as individual verifiability, secrecy, etc. So that no one can modify the vote; however, any voter can verify his/her vote during the whole vote period. Second, different blockchains are used to meet requirements such as eligibility, privacy, authentication, etc. So that the system detects whether the data is coming from an eligible or a non-eligible voter. The system ensures that votes and voters can not be correlated if it is an eligible voter. So, the privacy of eligible voters is always protected. Third, our blockchains ensure Consensus throughout the voting process. Fully replicated, distributed, transparent, and secure blockchains ensure that everything is under control. Fourth, internal control mechanisms are applied to meet requirements such as nonreusability, coercion-resistance, etc. So that eligible voters can cast just one vote within the specified period. The system keeps every sensitive data encrypted so that no one manipulates the results before the vote ends.
  • Master Thesis
    Blockchain Based Context Aware Access Control Structure Implementation for Security of Internet of Things System
    (01. Izmir Institute of Technology, 2022) Kul, Aslı; Demirörs, Onur; Erten, Yusuf Murat
    Nowadays, 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
    Blockchain Application on Loyalty Card
    (Izmir Institute of Technology, 2020) Sönmeztürk, Osman; Ayav, Tolga; Erten, Yusuf Murat
    Today, traditional loyalty systems are insufficient to meet the needs of users. The users need to stay within the loyalty system for a long time and accumulate points in order to win prizes and besides, the rewards they receive may be out of their interest. In addition, users usually forget the awards they have won in traditional loyalty systems and have difficulty in following up rewards. In addition to that, users usually do not prefer to share their personal information to join loyalty systems due to privacy concerns. Therefore, the number of customers in the loyalty systems is decreasing day by day. The designed loyalty program mentioned in this thesis works with IZTECH Tokens, which works on the Ethereum chain and are created by following ERC20 standards. Thanks to the new generation loyalty system, users can convert their earned tokens to Ethereum on the stock exchange without accumulating them or can receive services or products with the accumulated tokens according to their interests from a market that has been contracted by the manufacturer. Additionally, users in the designed system do not need to carry many cards, it is adequate to have only one Ethereum wallet. Furthermore, users do not need to share any personal data to join the loyalty system. Markets can request Ether from the manufacturer according to the number of tokens they have accumulated. The loyalty system mentioned in this thesis not only aims to establish a win-win relationship between the manufacturer, market, and client but also to find solutions to the customer problems mentioned above.