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 12 of 12 for “"Proof of stake"”.
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An alternative paradigm to analyze proof-of-stake protocols
… in DSpace on 2021-09-17T01:13:30Z (GMT). No. of bitstreams: 2 TRAN-THESIS-2021.pdf: 727856 bytes, checksum: 592dab0344d2e18481922ac0f004b0e0 (MD5) LICENSE.txt: 4206 bytes, checksum: 7fa3df11382bb4db5245ed7b0d39bbd2 (MD5) Previous issue date: 2021-04-27
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Proof-of-stake longest chain protocols: security vs predicability
… against any adversary with less than 50% of the total hashing power. Proof-of-stake (PoS) protocols are an energy-efficient alternative; however existing protocols adopting Nakamoto’s longest chain design achieve provable security only by allowing long-term predictability, subjecting the …
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Barracuda: The power of l-polling in proof of stake blockchains
Blockchain is a database of storing sequential events as a chain of blocks consistently across a distributed set of nodes. A fundamental problem in doing so is to decide where to put the next block and who should do it in a Sybil-resistant manner. To solve this problem, typically, a node is elected …
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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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Vault : fast bootstrapping for cryptocurrencies
… rely on participants to keep track of the state of the system in order to verify new transactions. As the number of users and transactions grows, this requirement places a significant burden on the users, as they need to download, verify, and store a large amount of data in order to …
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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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Plutus : measuring message gossiping in P2P networks and providing incentives in cryptocurrencies
… proven incentive mechanism for Algorand, a proof-of-stake cryptocurrency. In order to operate, Algorand requires users to constantly propagate messages but has no mechanism to incentivize users to do so. Plutus solves this problem by keeping track of each message propagation path and …
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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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Shell Game: Randomized representative based election to defend against 51% attacks in Crowd sensing frameworks
… devices and wearable have become an epicenter of human lives and have increasingly become more complex and powerful to make people’s life easier. Smart devices like smart phones and wearable like a smart watch today are equipped to provide pervasive connectivity, quality communication and a …
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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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Formal Proofs of Security for Privacy-Preserving Blockchains and other Cryptographic Protocols
… but combined inside complex protocols. The aim of this thesis is to analyse various cryptographic protocols and assess their security in a formal way. In chapter 1 the concept of formal proofs of security is introduced and the main categorisation of attack scenarios and types of adversary are …
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To ascertain if blockchain can facilitate the Internet of Things security and scalability requirements
… consensus algorithms have been proposed as a way of resolving the Byzantine General problem, with respect to the blockchain consensus process. However, when these consensus algorithms are applied to a distributed, asynchronous network, some suffer with security and/or scalability issues, while …