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In the era of a growing population, systemic changes to the world, and the rising risk of crises, humanity has been facing an unprecedented challenge of resource scarcity. Confronting and addressing the issues concerning the scarce…

Theoretical Economics · Economics 2022-11-23 Xiaowei Hu , Peng Li

Federated learning (FL) is a promising distributed learning solution that only exchanges model parameters without revealing raw data. However, the centralized architecture of FL is vulnerable to the single point of failure. In addition, FL…

Machine Learning · Computer Science 2021-01-12 Hang Chen , Syed Ali Asif , Jihong Park , Chien-Chung Shen , Mehdi Bennis

We introduce a model for decentralized networks with collaborating peers. The model is based on the stable matching theory which is applied to systems with a global ranking utility function. We consider the dynamics of peers searching for…

Networking and Internet Architecture · Computer Science 2007-05-23 Anh-Tuan Gai , Fabien Mathieu , Julien Reynier , Fabien De Montgolfier

Machine learning has recently enabled large advances in artificial intelligence, but these tend to be highly centralized. The large datasets required are generally proprietary; predictions are often sold on a per-query basis; and published…

Cryptography and Security · Computer Science 2019-07-18 Justin D. Harris , Bo Waggoner

The energy sustainability of blockchains, whose consensus protocol rests on the Proof-of-Work, nourishes a heated debate. The underlying issue lies in a highly energy-consuming process, defined as mining, required to validate crypto-asset…

Decentralized finance (DeFi) has become one of the most successful applications of blockchain and smart contracts. The DeFi ecosystem enables a wide range of crypto-financial activities, while the underlying smart contracts often contain…

Cryptography and Security · Computer Science 2021-04-20 Palina Tolmach , Yi Li , Shang-Wei Lin , Yang Liu

Machine learning algorithms are undoubtedly one of the most popular algorithms in recent years, and neural networks have demonstrated unprecedented precision. In daily life, different communities may have different user characteristics,…

Distributed, Parallel, and Cluster Computing · Computer Science 2022-05-24 Yang ChaoQun

Blockchain has emerged as a trusted and secure distributed ledger for transactions while also being decentralised, distributed and its legitimacy not guaranteed by a trusted authority. Since the appearance of Bitcoin, Blockchain has known…

Distributed, Parallel, and Cluster Computing · Computer Science 2018-10-01 Ioana Stanescu , Lenuta Alboaie , Andrei Panu

The rapid expansion of data worldwide invites the need for more distributed solutions in order to apply machine learning on a much wider scale. The resultant distributed learning systems can have various degrees of centralization. In this…

Distributed, Parallel, and Cluster Computing · Computer Science 2022-10-10 Mohamed Ghanem , Fadi Dawoud , Habiba Gamal , Eslam Soliman , Hossam Sharara , Tamer El-Batt

Web3Recommend is a decentralized Social Recommender System implementation that enables Web3 Platforms on Android to generate recommendations that balance trust and relevance. Generating recommendations in decentralized networks is a…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-07-06 Rohan Madhwal , Johan Pouwelse

Emerging network paradigms and applications increasingly rely on federated learning (FL) to enable collaborative intelligence while preserving privacy. However, the sustainability of such collaborative environments hinges on a fair and…

Computer Science and Game Theory · Computer Science 2026-02-04 Zhengwei Ni , Zhidu Li , Wei Chen , Zhaoyang Zhang , Zehua Wang , F. Richard Yu , Victor C. M. Leung

In high-speed rail (HSR) systems, federated learning (FL) enables cross-departmental flow prediction without sharing raw data. However, existing schemes suffer from two key limitations: (1) insufficient incentives, leading to free-riding…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-03-10 Mingjie Zhao , Cheng Dai , Fei Chen , Xin Chen , Kaoru Ota , Mianxiong Dong , Bing Guo

The development of underlying technologies in blockchain mostly revolves around a difficult problem: how to enhance the performance of the system and reduce various costs of nodes (such as communication, storage and verification) without…

Cryptography and Security · Computer Science 2023-12-04 Lide Xue , Wei Yang , Wei Li

Blockchain has come a long way: a system that was initially proposed specifically for cryptocurrencies is now being adapted and adopted as a general-purpose transactional system. As blockchain evolves into another data management system,…

Databases · Computer Science 2021-01-18 Pingcheng Ruan , Tien Tuan Anh Dinh , Dumitrel Loghin , Meihui Zhang , Gang Chen , Qian Lin , Beng Chin Ooi

This work proposes a novel proof-of-work blockchain incentive scheme such that, barring exogenous motivations, following the protocol is guaranteed to be the optimal strategy for miners. Our blockchain takes the form of a directed acyclic…

Cryptography and Security · Computer Science 2022-06-22 Jakub Sliwinski , Roger Wattenhofer

In recent years, blockchain has gained widespread attention as an emerging technology for decentralization, transparency, and immutability in advancing online activities over public networks. As an essential market process, auctions have…

Cryptography and Security · Computer Science 2022-11-29 Zeshun Shi , Cees de Laat , Paola Grosso , Zhiming Zhao

TrueBit is a protocol that uses interactive verification to allow a resource-constrained computation environment like a blockchain to perform much larger computations than usual in a trusted way. As long as a single honest participant is…

Cryptography and Security · Computer Science 2018-07-02 Julia Koch , Christian Reitwiessner

Decentralization has been touted as the principal security advantage which propelled blockchain systems at the forefront of developments in the financial technology space. Its exact semantics nevertheless remain highly contested and…

Cryptography and Security · Computer Science 2024-04-16 Christina Ovezik , Dimitris Karakostas , Aggelos Kiayias

The concept of ranking aggregation plays a central role in preference analysis, and numerous algorithms for calculating median rankings, often originating in social choice theory, have been documented in the literature, offering theoretical…

Machine Learning · Computer Science 2026-05-14 Kerrian Le Caillec , Anna Van Elst , Igor Colin , Stephan Clémençon

Blockchain technology is among the fastest-growing technologies in the world today. It has been adopted in diverse areas but mostly in financial systems, such as Bitcoin cryptocurrency. Therefore, it is a niche that has attracted interest…

Cryptography and Security · Computer Science 2021-06-30 Mabrook S. Al-Rakhami , Abdu Gumaei , Sk. Md. Mizanur Rahman , Atif Al-Amri