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Multi-task learning is an effective way to address the challenge of model personalization caused by high data heterogeneity in federated learning. However, extending multi-task learning to the online decentralized federated learning setting…

Machine Learning · Computer Science 2025-09-03 Olusola Odeyomi , Sofiat Olaosebikan , Ajibuwa Opeyemi , Oluwadoyinsola Ige

In Federated Reinforcement Learning (FRL), agents aim to collaboratively learn a common task, while each agent is acting in its local environment without exchanging raw trajectories. Existing approaches for FRL either (a) do not provide any…

Machine Learning · Computer Science 2024-01-09 Philip Jordan , Florian Grötschla , Flint Xiaofeng Fan , Roger Wattenhofer

Federated learning can solve the privacy protection problem in distributed data mining and machine learning, and how to protect the ownership, use and income rights of all parties involved in federated learning is an important issue. This…

Cryptography and Security · Computer Science 2025-07-11 Xiaogang Cheng , Ren Guo

Current blockchain consensus protocols -- notably, Proof of Work (PoW) and Proof of Stake (PoS) -- deliver global agreement but exhibit structural constraints. PoW anchors security in heavy computation, inflating energy use and imposing…

Cryptography and Security · Computer Science 2025-12-11 Kyle Habib , Vladislav Kapitsyn , Giovanni Mazzeo , Faisal Mehrban

Numerous distributed tasks have to be handled in a setting where a fraction of nodes behaves Byzantine, that is, deviates arbitrarily from the intended protocol. Resilient, deterministic protocols rely on the detection of majorities to…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-02-10 Philipp Schneider

Federated learning allows each client to keep its data locally when training machine learning models in a distributed setting. Significant recent research established the requirements that the input must satisfy in order to guarantee…

Machine Learning · Computer Science 2025-06-19 Mélanie Cambus , Darya Melnyk , Tijana Milentijević , Stefan Schmid

Federated learning is a decentralized machine learning paradigm that allows multiple clients to collaborate by leveraging local computational power and the models transmission. This method reduces the costs and privacy concerns associated…

Machine Learning · Computer Science 2023-07-03 Bipin Chhetri , Saroj Gopali , Rukayat Olapojoye , Samin Dehbash , Akbar Siami Namin

The rise of computational power has led to unprecedented performance gains for deep learning models. As more data becomes available and model architectures become more complex, the need for more computational power increases. On the other…

Cryptography and Security · Computer Science 2023-09-01 Mahmoud Salhab , Khaleel Mershad

The problem of Byzantine consensus has been key to designing secure distributed systems. However, it is particularly difficult, mainly due to the presence of Byzantine processes that act arbitrarily and the unknown message delays in general…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-05-05 Alejandro Ranchal-Pedrosa , Vincent Gramoli

Federated learning (FL) enables multiple clients to collaboratively train machine learning models without revealing their private training data. In conventional FL, the system follows the server-assisted architecture (server-assisted FL),…

Cryptography and Security · Computer Science 2024-07-16 Minghong Fang , Zifan Zhang , Hairi , Prashant Khanduri , Jia Liu , Songtao Lu , Yuchen Liu , Neil Gong

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

Federated learning (FL) is an emerging distributed learning paradigm without sharing participating clients' private data. However, existing works show that FL is vulnerable to both Byzantine (security) attacks and data reconstruction…

Cryptography and Security · Computer Science 2024-07-30 Chenfei Nie , Qiang Li , Yuxin Yang , Yuede Ji , Binghui Wang

We discuss future directions of Blockchain as a collaborative value co-creation platform, in which network participants can gain extra insights that cannot be accessed when disconnected from the others. As such, we propose a decentralized…

Machine Learning · Computer Science 2022-08-25 Tsuyoshi Idé , Rudy Raymond

Federated learning is an emerging privacy-preserving AI technique where clients (i.e., organisations or devices) train models locally and formulate a global model based on the local model updates without transferring local data externally.…

Machine Learning · Computer Science 2021-11-01 Sin Kit Lo , Yue Liu , Qinghua Lu , Chen Wang , Xiwei Xu , Hye-Young Paik , Liming Zhu

A significant body of research in decentralized federated learning focuses on combining the privacy-preserving properties of federated learning with the resilience and transparency offered by blockchain-based systems. While these approaches…

Cryptography and Security · Computer Science 2025-06-04 Gabriele Digregorio , Francesco Bleggi , Federico Caroli , Michele Carminati , Stefano Zanero , Stefano Longari

Blockchain consensus mechanisms must balance security, decentralization, and efficiency while ensuring fair participation. Proof of Team Sprint (PoTS) is a cooperative consensus mechanism designed to address the energy inefficiencies and…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-03-26 Naoki Yonezawa

The paper presents an innovative approach to address the challenges of scalability and reliability in Distributed Federated Learning by leveraging the integration of blockchain technology. The paper focuses on enhancing the trustworthiness…

Machine Learning · Computer Science 2025-07-11 Ajay Kumar Shrestha , Faijan Ahamad Khan , Mohammed Afaan Shaikh , Amir Jaberzadeh , Jason Geng

The decentralized cryptocurrency Bitcoin has experienced great success but also encountered many challenges. One of the challenges has been the long confirmation time. Another challenge is the lack of incentives at certain steps of the…

Cryptography and Security · Computer Science 2017-11-21 Ittai Abraham , Dahlia Malkhi , Kartik Nayak , Ling Ren , Alexander Spiegelman

In this paper we present an open source, fully asynchronous, leaderless algorithm for reaching consensus in the presence of Byzantine faults in an asynchronous network. We prove the algorithm's correctness provided that less than a third of…

Cryptography and Security · Computer Science 2019-07-29 Pierre Chevalier , Bartlomiej Kaminski , Fraser Hutchison , Qi Ma , Spandan Sharma , Andreas Fackler , William J Buchanan

Network traffic prediction plays a crucial role in intelligent network operation. Traditional prediction methods often rely on centralized training, necessitating the transfer of vast amounts of traffic data to a central server. This…

Machine Learning · Computer Science 2025-05-27 Hui Ma , Kai Yang , Yang Jiao