Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"Proof of Work (PoW)"”.
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Reinforcement Learning assisted Adaptive difficulty of Proof of Work (PoW) in Blockchain-enabled Federated Learning
This work addresses the challenge of heterogeneity in blockchain mining, particularly in the context of consortium and private blockchains. The motivation stems from ensuring fairness and efficiency in blockchain technology's Proof of Work (PoW) consensus mechanism. Existing consensus algorithms, …
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Understanding scalability in distributed ledger technology
… is required to demonstrate the true value of DLT. This dissertation first analyses scalability in ethereum and EOS. Currently, ethereum 1.0 uses proof of work (PoW) and handles only 14 transactions per second (tps) compared to Visa's peak 47 000 tps. Ethereum 2.0, known as Serenity, …
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Assessing Blockchain’s Potential to Ensure Data Integrity and Security for AI and Machine Learning Applications
<p>The increasing use of data-centric approaches in the fields of Machine Learning and Artificial Intelligence (ML/AI) has raised substantial issues over the security, integrity, and trustworthiness of data. In response to this challenge, Blockchain technology offered a promising and practical …
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Proof-of-Work Based Mitigation of Real Time Video DDoS Attacks
… grow in size and complexity, Distributed Denial of Service (DDoS) attacks grow in size and complexity alongside it. One particularly common form of DDoS attack is the TCP SYN flood, which exploits the TCP handshake process to exhaust server resources. This thesis investigates the use of a novel …
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Security for proof of work blockchains via checkpointing
Finality gadgets are comprised of a Byzantine Fault Tolerant (BFT) protocol finalizing blocks produced by a Proof-of-Work (PoW) or Proof-of-Stake (PoS) chain protocol. They have become very popular methods for combining the best features of the BFT and PoW protocols and are proposed for deployment …
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Simulating Internet of Things Mobile Ad-Hoc Networks with Distributed Ledger Technology: "Which DLT is Best?"
Internet of Things (IoT) and Distributed Ledger Technologies (DLTs), are both young fields that are especially suited to covering low-power decentralized environments. We identify an under-studied niche of IoT Mobile Ad-hoc NETworks (MANETs) to best utilize DLTs, and challenge ourselves to put an …
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Formally verifying the security properties of a proof-of-stake blockchain protocol
… existence, as the first real-world application of blockchain protocols, by its pseudonymous and mysterious creator, Satoshi Nakamoto. It was presented as a form of cryptocurrency, has become widely known and been recognised as the first successful E-cash since the introduction of the E-cash idea …
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Analysis and design of blockchain systems
Since the advent of Bitcoin in 2008, cryptocurrencies and the blockchain systems they are built upon have seen parabolic growth in almost every aspect of human culture. As blockchain technology continues to evolve, the need for rigorous analysis and thoughtful design of blockchain protocols has …
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Improved blockchain - Proof-of-work consensus protocol - performance using machine learning
… It is a new paradigm that helps in the existence of cryptocurrency and eliminates the third party in a financial transaction. It has the potential to optimise, enhance and streamline many processes outside the cryptocurrency and financial sector but the adoption of the technology is limited by the …
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Blockchain Framework for Secured On-Demand Patient Health Records Sharing
… share patient data for a better understanding of patient health history, cybersecurity must remain a top priority. However, patient health record (PHR) data is extremely sensitive and faces significant challenges due to its distributed nature across various healthcare facilities and providers, …
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Essays on Incentive Designs to Improve Market Performance
This dissertation is composed of three chapters. Each essay describes and models the structure of a market; identifies an inefficiency in outcomes and proposes an incentive scheme to reduce the inefficiency. First Chapter: Coordination Problems, Leverage Constraints and Smart Contract Solutions for …