Blockchain reputation-based consensus: A scalable and resilient mechanism for distributed mistrusting applications

Oliveira, Marcela T. de; Reis, Lúcio Henrik Amorim; Medeiros, Dianne S. V.; Carrano, Ricardo C.; Olabarriaga, Sílvia D.; Mattos, Diogo M. F.

doi:10.1016/j.comnet.2020.107367

Cited by 71 publications

(33 citation statements)

References 13 publications

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“…A avaliac ¸ão da proposta foi realizada em um simulador orientado a eventos discretos [Oliveira et al 2020]. O simulador de eventos discretos para a avaliac ¸ão de plataformas de cadeia de blocos é validado em trabalhos anteriores [Oliveira et al 2019, Oliveira et al 2020.…”

Section: Avaliac ¸ãO E Resultadosunclassified

Consenso por Localidade: Um Mecanismo de Consenso Leve com Convergência por Vizinhanças para Cadeia de Blocos

Carrara¹,

Mattos²,

Albuquerque³

2021

Anais Do IV Workshop Em Blockchain: Teoria, Tecnologias E Aplicações (WBlockchain 2021)

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Cadeias de blocos privadas tendem a aplicar mecanismos de consenso determinísticos como alternativa aos baseados em prova. Mecanismos determinísticos toleram dois tipos de falhas, bizantinas e de parada. O consenso tolerante a falhas bizantinas assume hipóteses restritivas de tempo e número de falhas para garantir a validade, enquanto a terminação depende da difusão de mensagens entre o nós. O consenso tolerante a falhas é menos restritivo para garantir a terminação e maior vazão, sacrificando o acordo. Este artigo propõe um mecanismo de consenso leve baseado na votação por localidade com difusão confirmada de mensagens. Regras de formação nas vizinhanças da rede par-a-par ﬂexibilizam a relação de compromisso entre acordo e o custo de terminação. Resultados experimentais mostram que o acordo e terminação são garantidos no caso de uso de regras mais permissivas, enquanto o custo para alcançar o consenso é reduzido em até 46% em regras mais restritivas com baixo impacto sobre a terminação e o acordo.

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Section: Avaliac ¸ãO E Resultadosunclassified

Consenso por Localidade: Um Mecanismo de Consenso Leve com Convergência por Vizinhanças para Cadeia de Blocos

Carrara¹,

Mattos²,

Albuquerque³

2021

Anais Do IV Workshop Em Blockchain: Teoria, Tecnologias E Aplicações (WBlockchain 2021)

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“…Currently, HSC optimization has mostly focused on the transportation sector. In literature, the researchers highlighted the importance of H 2 as a potential cleaner fuel source in the transportation sector (Ochoa Bique and Zondervan, 2018;Khatri and Khatri, 2020;Oliveira et al, 2020;Zareei and Rohani, 2020). They comprehensively investigated the feasibility of hydrogen as transportation fuel from a supply chain point of view through superstructure modeling to make it viable to replace the fossil fuel (Ochoa Bique and Zondervan, 2018;Talebian et al, 2019;Seo et al, 2020).…”

Section: Development Of Multi-sector Hydrogen Supply Chain Mapping and Optimizationmentioning

confidence: 99%

Prospects and Challenges of Green Hydrogen Economy via Multi-Sector Global Symbiosis in Qatar

Eljack

Kazi

2021

Front. Sustain.

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Low carbon hydrogen can be an excellent source of clean energy, which can combat global climate change and poor air quality. Hydrogen based economy can be a great opportunity for a country like Qatar to decarbonize its multiple sectors including transportation, shipping, global energy markets, and industrial sectors. However, there are still some barriers to the realization of a hydrogen-based economy, which includes large scale hydrogen production cost, infrastructure investments, bulk storage, transport & distribution, safety consideration, and matching supply-demand uncertainties. This paper highlights how the aforementioned challenges can be handled strategically through a multi-sector industrial-urban symbiosis for the hydrogen supply chain implementation. Such symbiosis can enhance the mutual relationship between diverse industries and urban planning by exploring varied scopes of multi-purpose hydrogen usage (i.e., clean energy source as a safer carrier, industrial feedstock and intermittent products, vehicle and shipping fuel, and international energy trading, etc.) both in local and international markets. It enables individual entities and businesses to participate in the physical exchange of materials, by-products, energy, and water, with strategic advantages for all participants. Besides, waste/by-product exchanges, several different kinds of synergies are also possible, such as the sharing of resources and shared facilities. The diversified economic base, regional proximity and the facilitation of rules, strategies and policies may be the key drivers that support the creation of a multi-sector hydrogen supply chain in Qatar.

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“…Blockchain plays a paradigm shift in today's society, with Bitcoin and Ethereum cryptocurrencies leading the market and being the precursors to several other cryptocurrencies. For this reason, the consensus protocols for the blockchains attract the attention of several research groups [16,31,68,69]. The consensus vulnerabilities associated with each consensus protocol and their respective countermeasures are not widely explored.…”

Section: Related Workmentioning

confidence: 99%

A security and performance analysis of proof-based consensus protocols

et al. 2021

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Blockchain is a disruptive technology that will revolutionize the Internet and our way of living, working, and trading. However, the consensus protocols of most blockchain-based public systems show vulnerabilities and performance limitations that hinder the mass adoption of blockchain. This paper presents and compares the main proof-based consensus protocols, focusing on the security and performance of each consensus protocol. Proof-based protocols use the probabilistic consensus model and are more suitable for public environments with many participants, such as the Internet of Things (IoT). We highlight the centralization tendency and the main vulnerabilities of Proof of Work (PoW), Proof of Stake (PoS), and their countermeasures. We also analyze and compare alternative proof-based protocols, such as Proof of Elapsed Time (PoET), Proof of Burn (PoB), Proof of Authority (PoA), and Delegated Proof of Stake (DPoS). Finally, we analyze the security of the IOTA consensus protocol, a DAG-based platform suited for the IoT environment. Keywords Blockchain • Consensus • Security1 Satoshi Nakamoto is a pseudonym used by the creator or creators of the Bitcoin cryptocurrency. The real identity is unknown. 2 The network nodes are identified by an asymmetric key pair, that provides a some level of anonymity. However, curious nodes can infer identity information based on blockchain history.

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Blockchain reputation-based consensus: A scalable and resilient mechanism for distributed mistrusting applications

Cited by 71 publications

References 13 publications

Consenso por Localidade: Um Mecanismo de Consenso Leve com Convergência por Vizinhanças para Cadeia de Blocos

Consenso por Localidade: Um Mecanismo de Consenso Leve com Convergência por Vizinhanças para Cadeia de Blocos

Prospects and Challenges of Green Hydrogen Economy via Multi-Sector Global Symbiosis in Qatar

A security and performance analysis of proof-based consensus protocols

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