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 5 of 5 for “"double-spending"”.
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Blockchain Security: Double-Spending Attack and Prevention
… proof of work are vulnerable to hashrate-based double-spending attacks due to abuse of majority rule. Through building a private fork of Litecoin and executing a double-spending attack this thesis examines the mechanics and principles behind the attack. This thesis also conducts a survey of …
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Simulation-Based Evaluation of Transaction Finality in Bitcoin Using CNSIM
… implemented to create a detailed simulation for double-spending scenarios. Using this extended simulator, a systematic evaluation was conducted to assess the attack's impact on transaction finality, quantifying how network resilience degrades as malicious hash power increases. The findings …
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An ECDSA Nullifier Scheme and a Proof of Identity Application
… anonymous account, to forbid actions like double spending, or allow a consistent identity between anonymous actions. We identify a new deterministic algorithm that both uniquely identifies the keypair and keeps the account identity secret. In this work, we will define the full construction, …
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Formally verifying the security properties of a proof-of-stake blockchain protocol
… of a trusted third party, it appears to prevent double-spending attacks. Bitcoin's security is obtained by the use of cryptographically secure chains of blocks for time-stamping (hence the name 'blockchain') and a technique, often called Nakamoto consensus, combined from the longest-chain rule …
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Towards a Cryptographically Verifiable Database Management System
… exchanges went bankrupt due to hackers double-spending their coins through isolation-level attacks. To address this issue, this dissertation presents Litmus, a database management system that can provide verifiable proofs of transaction correctness and semantic properties, including …