Rethinking Blockchain Security: Position Paper

Chia, Vincent; Hartel, Pieter H.; Hum, Qingze; Ma, Sebastian; Piliouras, Georgios; Reijsbergen, Daniël; Staalduinen, Mark van; Szałachowski, Paweł

doi:10.1109/cybermatics_2018.2018.00222

Cited by 25 publications

(23 citation statements)

References 29 publications

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“…Ethernaut [41] is a wargame focused on Ethereum smart contract vulnerabilities in Solidity. There are several good articles discussing blockchain security [2,17,46] as well.…”

Section: Education and Further Readingmentioning

confidence: 99%

Blockchain Vulnerabilities in Practice

Amiet

2021

Digital Threats

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“…Ethernaut [41] is a wargame focused on Ethereum smart contract vulnerabilities in Solidity. There are several good articles discussing blockchain security [2,17,46] as well.…”

Section: Education and Further Readingmentioning

confidence: 99%

Blockchain Vulnerabilities in Practice

Amiet

2021

Digital Threats

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“…There are ways to identify and prevent vulnerabilities. The most common among those are making sure issues and solutions are documented, fuzzing the inputs to make sure vulnerability does not exist, mutating the contracts to make sure prevention is sufficient for the test cases and replicating the tests from similar contracts in the same blockchain [187]..…”

Section: State Of the Body Of Knowledgementioning

confidence: 99%

“…Smart contracts related attacks are mainly in the second category. A smart contact related incident is a result of deployment and execution of a smart contact that contains vulnerabilities [187].…”

Section: Attacks: Motivation and Significancementioning

confidence: 99%

Blockchain-Based Delivery Assurance

Demir¹

2021

Preprint

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Climate-related catastrophes and wars are leaving people in need of aid. The main obstacle in providing help to people in need is the lack of trust in aid processes. Donors and charity organizations want to make sure that funds and materials gathered reach the intended destinations. The lack of proof leads to a general sentiment of waste, corruption and misuse, which undermines aid efforts. Blockchain technology injects trust into the business transactions through impeccable record keeping and fulfils the lack of trust problem in aid delivery. However, our review of relevant literature indicates that a delivery assurance framework that covers major aspects of providing a blockchain-based solution to aid delivery is absent.<div>In this thesis, we propose a novel blockchain-based transparent delivery framework for creating solutions that record and share data on the interaction of business participants involved in a delivery process. This framework is novel as it creates solutions that include handover and monitoring aspects of the delivery business and adds several benefits that come with the blockchain technology. This delivery assurance framework also provides complete guidance as it answers several key questions such as “How can we use blockchain technology to solve problems?” and “How can we make sure the solutions are financially viable and acceptable?”</div><div>Our simulation study validates the applicability of our framework and the solution we created using the framework. Further, the validation we received from an industry expert strongly suggests that a solution developed with our framework is applicable in industry. This thesis presents the development of the framework along with details on the design and execution of our simulations, including the raw data, data enhancement processes, tools, data structures, smart contract code, load testing methodology and the eventual analysis of the simulation results. <br></div>

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“…15,18 Although pessimistic, the scenario in which adversaries sustain an attack despite suffering losses on their own stake gains credence in the presence of potential out-of-protocol profits. Further, consensus mechanisms that rely on PoS selection are vulnerable to flash or blindsiding attacks conducted by entering nodes 57,58 or to accidental faults such as network latency, bad connectivity, or simple negligence. Weighted voting provides lines of defense (in an obvious way) against these kinds of attacks or faults while retaining the benefits of the underlying PoS design.…”

Section: Defense Against Known Attacksmentioning

confidence: 99%

Weighted voting on the blockchain: Improving consensus in proof of stake protocols

2020

Self Cite

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Proof of Stake (PoS) protocols rely on voting mechanisms to reach consensus on the current state. If an enhanced majority of staking nodes, also called validators, agree on a proposed block, then this block is appended to the blockchain. Yet, these protocols remain vulnerable to faults caused by validators who abstain either accidentally or maliciously.To protect against such faults while retaining the PoS selection and reward allocation schemes, we study weighted voting in validator committees. We formalize the block creation process and introduce validators' voting profiles which we update by a multiplicative weights algorithm relative to validators' voting behavior and aggregate blockchain rewards. Using this framework, we leverage weighted majority voting rules that optimize collective decision making to show, both numerically and analytically, that the consensus mechanism is more robust if validators' votes are appropriately scaled. We raise potential issues and limitations of weighted voting in trustless, decentralized networks and relate our results to the design of current PoS protocols.

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Rethinking Blockchain Security: Position Paper

Cited by 25 publications

References 29 publications

Blockchain Vulnerabilities in Practice

Blockchain Vulnerabilities in Practice

Blockchain-Based Delivery Assurance

Weighted voting on the blockchain: Improving consensus in proof of stake protocols

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