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Browsing by Subject "blockchain"

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  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Analiza kryptowaluty jako środka płatniczego i obiektu spekulacji
    (Data obrony: 2019-01-22) Kosachevych, Vasylyna
    Wydział Zarządzania
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Analiza protokołów opartych na technologii blockchain
    (Data obrony: 2020-12-08) Tańcula, Jakub
    Wydział Elektrotechniki, Automatyki, Informatyki i Inżynierii Biomedycznej
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Blockchain na potrzeby dydaktyki i demonstracji działania
    (Data obrony: 2020-01-21) Węgrzyn, Patryk; Frejek, Grzegorz; Radoń, Konrad
    Wydział Informatyki, Elektroniki i Telekomunikacji
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Blockchain na potrzeby dydaktyki i demonstracji działania
    (Data obrony: 2020-01-21) Frejek, Grzegorz; Węgrzyn, Patryk; Radoń, Konrad
    Wydział Informatyki, Elektroniki i Telekomunikacji
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Blockchain na potrzeby dydaktyki i demonstracji działania
    (Data obrony: 2020-01-21) Radoń, Konrad; Węgrzyn, Patryk; Frejek, Grzegorz
    Wydział Informatyki, Elektroniki i Telekomunikacji
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Blockchain-based vulnerabilities registry for cloud native applications
    (Data obrony: 2020-12-11) Zmilczak, Piotr
    Wydział Informatyki, Elektroniki i Telekomunikacji
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Improving the quality of production processes using blockchain
    (Data obrony: 2020-10-30) Jurczyk, Kamil
    Wydział Informatyki, Elektroniki i Telekomunikacji
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Możliwości i ograniczenia zastosowania blockchain w energetyce.
    (Data obrony: 2020-01-24) Kierczak, Bartosz
    Wydział Energetyki i Paliw
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Optchain: an advanced optimization method for enhancing IoT Data security via blockchain
    (Wydawnictwa AGH, 2025) Kokate, Shatakshi; Shrawankar, Urmila
    The increased use of IoT devices in various domains generates abundant data traffic. Securing this data during its transfer and storage is essential. Blockchain is now a trending technology to provide security to the data; however, it is observed that blockchain performs poorly while managing large volume data. To mitigate this issue, an advanced Optchain method to reduce the data size before submitting it to the blockchain network is discussed in this paper. This Optchain method optimizes IoT-generated data using data-classification and compression techniques. The classification of data as relevant or irrelevant is based on predefined thresholds of critical healthcare parameters. Subsequently, the Optchain method employs the Z-standard algorithm for compressing only the relevant data, ensuring efficient storage and faster blockchain transactions. Simulation results using the iFogSim simulator and Ethereum blockchain demonstrated improved storage costs and computational times compared to traditional methods.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Performance evaluation of a lightweight consensus protocol for blockchain in IoT networks
    (Wydawnictwa AGH, 2025) Kaur, Manpreet; Gupta, Shikha
    The consensus protocol is essential in practically every blockchain application. Most of these existing blockchain consensus protocols need massive computational capabilities, substantial energy consumption, and dependency on monetary stakes. These shortcomings in the mainstream consensus approach lead to their unsuitability for low-resource applications like IoT. As a result of this work, a lightweight consensus process referred as Delegated Proof of Accessibility (DPoAC) is implemented and evaluated. DPoAC makes use of Shamir secret sharing, Proof of Stake (PoS) with random selection, and the Inter-Planetary File System (IPFS). The DPoAC operation is composed of four modules: secret generation and distribution, retrieval of secret shares, block creation and verification, and block rewards and penalty. A detailed description of DPoAC has been provided and implemented in JavaScript and experimental results demonstrate that our solution meets the necessary performance and security requirements for a lightweight scalable protocol for IoT systems.
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Perspektywy rozwoju rynku kryptowalut
    (Data obrony: 2019-07-04) Żaczek, Jakub
    Wydział Zarządzania
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Predykcja kursów kryptowalut
    (Data obrony: 2019-06-28) Cieraszewski, Dominik
    Wydział Elektrotechniki, Automatyki, Informatyki i Inżynierii Biomedycznej
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Privacy preservation for transaction initiators: stronger key image ring signature and smart contract-based framework
    (Wydawnictwa AGH, 2023) Odoom, Justice; Huang, Xiaofang; Danso, Samuel; Nyarko, Benedicta Nana Esi
    Recently, blockchain technology has garnered a great deal of suport, however, an attenuating factor to its global adoption in certain use cases is privacypreservation (owing to its inherent transparency). A widely explored cryptographic option to address this challenge has been a ring signature that, aside from its privacy guarantee, must be double-spending resistant. In this paper, we identify and prove a catastrophic flaw for double-spending attacks in a lightweight ring signature scheme and proceed to construct a new fortified commitment scheme that uses a signer’s entire private key. Subsequently, we compute a stronger key image to yield a double-spending-resistant signature scheme that is solidly backed by formal proof. Inherent in our solution is a novel, zero-knowledge-based, secure, and cost-effective smart contract for public key aggregation. We test our solution on a private blockchain as well as a Kovan testnet along with a performance analysis that attests to its efficiency and usability – and, we make the code publicly available on GitHub.
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Open Access ,
    Rola IT w realizacji celów gospodarki o obiegu zamkniętym
    (Data obrony: 2020-10-20) Ręczak, Michał
    Wydział Zarządzania
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Rozwiązania FinTech jako podstawa transformacji procesów biznesowych
    (Data obrony: 2020-10-15) Udalova, Tetiana
    Wydział Zarządzania
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Securing centralized SDN control with distributed blockchain technology
    (Wydawnictwa AGH, 2023) Ahmad, Suhail; Mir, Ajaz Hussain
    Software-Defined Networks (SDN) advocate the segregation of network control logic, forwarding functions and management applications into different planes to achieve network programmability and automated and dynamic flow control in next-generation networks. It promotes the deployment of novel and augmented network-management functions in order to have flexible, robust, scalable, and cost-effective network deployments. All of these features introduce new research challenges and require secure communication protocols among segregated network planes. This manuscript focuses on the security issue of the southbound interface that operates between the SDN control and the data plane. We have highlighted the security threats that are associated with an unprotected southbound interface and those issues that are related to the existing TLS-based security solution. A lightweight blockchain-based decentralized security solution is proposed for the southbound interface to secure the resources of logically centralized SDN controllers and distributed forwarding devices from opponents. The proposed mechanism can operate in multi-domain SDN deployment and can be used with a wide range of network controllers and data plane devices. In addition to this, the proposed security solution has been analyzed in terms of its security features, communication, and re-authentication overhead.
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Symulator środowiska użytkowników rejestru blockchain wykorzystujący technologię wieloagentową.
    (Data obrony: 2020-01-21) Klimowski, Maciej
    Wydział Informatyki, Elektroniki i Telekomunikacji
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Symulator środowiska użytkowników rejestru blockchain wykorzystujący technologię wieloagentową.
    (Data obrony: 2020-01-21) Karkocha, Tomasz
    Wydział Informatyki, Elektroniki i Telekomunikacji
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Symulator środowiska użytkowników rejestru blockchain wykorzystujący technologię wieloagentową.
    (Data obrony: 2020-01-21) Boszczyk, Piotr
    Wydział Informatyki, Elektroniki i Telekomunikacji
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Symulator środowiska użytkowników rejestru blockchain wykorzystujący technologię wieloagentową.
    (Data obrony: 2020-01-21) Lubczyński, Piotr
    Wydział Informatyki, Elektroniki i Telekomunikacji