Accurate and decentralized timestamping using smart contracts on the Ethereum blockchain

Estevam, Gabriel; Palma, Lucas M.; Silva, Luan R.; Martina, Jean Everson; Vigil, Martín

doi:10.1016/j.ipm.2020.102471

Cited by 32 publications

(17 citation statements)

References 17 publications

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“…Due to these features, it is suitable for various usage areas such as tracking and monitoring of supply chains, trade finance, loyalty and reward programs, and reconciliation of financial assets (Hang and Kim, 2021). Ethereum is a decentralized blockchain platform that is useful to build public blockchain applications (Estevam et al, 2021). Corda is an open-source blockchain project designed for business.…”

Section: Background On Blockchain Technologymentioning

confidence: 99%

Blockchain Applications and Opportunities for Water Resources and Hydrology: A Systematic Review

Satilmsioglu¹,

Sermet²,

Demir³

2023

Preprint

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Although blockchain technology was first applied for peer-to-peer financial transactions, it has been used for the digitalization of physical asset management and data management processes in many areas in the industry and academia, including the water domain. Its potential as an immutable data storage system and smart contract integration has provided a plethora of use cases and utility in the domain of hydrology and water resources. In this article, a comprehensive systematic literature review on blockchain applications, opportunities and challenges for the water sector is conducted. The study provides the examination of academic publications, technical reports, whitepapers, hackathon projects, non-academic content and evaluation of the published year, focused hydrology sub-domain, utilized blockchain networks, tools, and development level of application of reviewed content. The current status of blockchain technology in the hydrology literature, potential application areas in the water sector, research gaps, and challenges are discussed from different perspectives, and future study areas are recommended.

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Section: Background On Blockchain Technologymentioning

confidence: 99%

Blockchain Applications and Opportunities for Water Resources and Hydrology: A Systematic Review

Satilmsioglu¹,

Sermet²,

Demir³

2023

Preprint

View full text Add to dashboard Cite

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“…Lakhan et al [32] proposed to develop a new, cost-effective and stable IoMT framework based on Wuyun supporting blockchain. Estevam et al [33] proposed a new decentralized timestamp service that combines smart contracts and different time providers. Chen et al [34] proposed an incentive compatible reasonable secret scheme to construct a game tree with imperfect information to facilitate our analysis and proof, and directly eliminate the strict control strategy to simplify the game tree.…”

Section: Smart Contractmentioning

confidence: 99%

Cooperative Detection Method for DDoS Attacks Based on Blockchain

Cheng¹,

Yao²,

Li³

et al. 2022

Computer Systems Science and Engineering

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Distributed Denial of Service (DDoS) attacks is always one of the major problems for service providers. Using blockchain to detect DDoS attacks is one of the current popular methods. However, the problems of high time overhead and cost exist in the most of the blockchain methods for detecting DDoS attacks. This paper proposes a blockchain-based collaborative detection method for DDoS attacks. First, the trained DDoS attack detection model is encrypted by the Intel Software Guard Extensions (SGX), which provides high security for uploading the DDoS attack detection model to the blockchain. Secondly, the service provider uploads the encrypted model to Inter Planetary File System (IPFS) and then a corresponding Content-ID (CID) is generated by IPFS which greatly saves the cost of uploading encrypted models to the blockchain. In addition, due to the small amount of model data, the time cost of uploading the DDoS attack detection model is greatly reduced. Finally, through the blockchain and smart contracts, the CID is distributed to other service providers, who can use the CID to download the corresponding DDoS attack detection model from IPFS. Blockchain provides a decentralized, trusted and tamper-proof environment for service providers. Besides, smart contracts and IPFS greatly improve the distribution efficiency of the model, while the distribution of CID greatly improves the efficiency of the transmission on the blockchain. In this way, the purpose of collaborative detection can be achieved, and the time cost of transmission on blockchain and IPFS can be considerably saved. We designed a blockchain-based DDoS attack collaborative detection framework to improve the data transmission efficiency on the blockchain, and use IPFS to greatly reduce the cost of the distribution model. In the experiment, compared with most blockchain-based method for DDoS attack detection, the proposed model using blockchain distribution shows the advantages of low cost and latency. The remote authentication mechanism of Intel SGX provides high security and integrity, and ensures the availability of distributed models.

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“…Transaction Ordering: An alternative solution to prevent frontrunning could be enforcing an ordering on transactions, i.e., timestamps. However, challenges such as synchronization, delay on the peer-to-peer network, unwillingness to create a centralized timestamp server, or depend on off-chain services to produce timestamps discouraged us from going this route [19], [27]. Verifiers: One might question the need for VDF in the existence of an honest-majority committee rather than relying on the verifiers waiting for a certain amount of time.…”

Section: Design Choicesmentioning

confidence: 99%

FIRST: FrontrunnIng Resilient Smart ConTracts

Sariboz¹,

Panwar²,

Vishwanathan³

et al. 2022

Preprint

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Owing to the meteoric rise in the usage of cryptocurrencies, there has been a widespread adaptation of traditional financial applications such as lending, borrowing, margin trading, and more, to the cryptocurrency realm. In some cases, the inherently transparent and unregulated nature of cryptocurrencies leads to attacks on users of these applications. One such attack is frontrunning, where a malicious entity leverages the knowledge of currently unprocessed financial transactions submitted by users and attempts to get its own transaction(s) executed ahead of the unprocessed ones. The consequences of this can be financial loss, inaccurate transactions, and even exposure to more attacks. We propose FIRST, a framework that prevents frontrunning attacks, and is built using cryptographic protocols including verifiable delay functions and aggregate signatures. In our design, we have a federated setup for generating the public parameters of the VDF, thus removing the need for a single trusted setup. We formally analyze FIRST, prove its security using the Universal Composability framework and experimentally demonstrate the effectiveness of FIRST.

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Accurate and decentralized timestamping using smart contracts on the Ethereum blockchain

Cited by 32 publications

References 17 publications

Blockchain Applications and Opportunities for Water Resources and Hydrology: A Systematic Review

Blockchain Applications and Opportunities for Water Resources and Hydrology: A Systematic Review

Cooperative Detection Method for DDoS Attacks Based on Blockchain

FIRST: FrontrunnIng Resilient Smart ConTracts

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