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Byzantine fault tolerance (BFT) consensus is a fundamental primitive for distributed computation. However, BFT protocols suffer from the ordering manipulation, in which an adversary can make front-running. Several protocols are proposed to…

分布式、并行与集群计算 · 计算机科学 2022-09-20 Guangren Wang , Liang Cai , Fangyu Gai , Jianyu Niu

This paper presents TetraBFT, a novel unauthenticated Byzantine fault tolerant protocol for solving consensus in partial synchrony, eliminating the need for public key cryptography and ensuring resilience against computationally unbounded…

密码学与安全 · 计算机科学 2026-04-14 Qianyu Yu , Giuliano Losa , Xuechao Wang

Batch reinforcement learning (BRL) is an emerging research area in the RL community. It learns exclusively from static datasets (i.e. replay buffers) without interaction with the environment. In the offline settings, existing replay…

机器学习 · 计算机科学 2022-10-03 Hsin-Yu Liu , Xiaohan Fu , Bharathan Balaji , Rajesh Gupta , Dezhi Hong

Blockchain technology sparked renewed interest in planetary-scale Byzantine fault-tolerant (BFT) state machine replication (SMR). While recent works predominantly focused on improving the scalability and throughput of these protocols, few…

分布式、并行与集群计算 · 计算机科学 2024-10-01 Christian Berger , Lívio Rodrigues , Hans P. Reiser , Vinicius Cogo , Alysson Bessani

One of the most celebrated problems of fault-tolerant distributed computing is the consensus problem. It was shown to abstract a myriad of problems in which processes have to agree on a single value. Consensus applications include…

分布式、并行与集群计算 · 计算机科学 2022-09-13 Romaric Duvignau , Michel Raynal , Elad Michael Schiller

Blockchain has been forming the central piece of various types of vehicle-to-everything (V2X) network for trusted data exchange. Recently, permissioned blockchains garner particular attention thanks to their improved scalability and diverse…

网络与互联网体系结构 · 计算机科学 2024-10-30 Seungmo Kim , Ahmed S. Ibrahim

The cost of Byzantine Fault Tolerant (BFT) storage is the main concern preventing its adoption in practice. This cost stems from the need to maintain at least 3t+1 replicas in different storage servers in the asynchronous model, so that t…

分布式、并行与集群计算 · 计算机科学 2014-02-14 Christian Cachin , Dan Dobre , Marko Vukolic

Synchronous consensus protocols offer a significant advantage over their asynchronous and partially synchronous counterparts by providing higher fault tolerance -- an essential benefit in distributed systems, like blockchains, where…

分布式、并行与集群计算 · 计算机科学 2025-03-14 Nenad Milošević , Daniel Cason , Zarko Milošević , Robert Soulé , Fernando Pedone

Intelligent agents should have the ability to leverage knowledge from previously learned tasks in order to learn new ones quickly and efficiently. Meta-learning approaches have emerged as a popular solution to achieve this. However,…

机器学习 · 计算机科学 2023-02-17 Zhao Mandi , Pieter Abbeel , Stephen James

Federated learning is a novel framework that enables resource-constrained edge devices to jointly learn a model, which solves the problem of data protection and data islands. However, standard federated learning is vulnerable to Byzantine…

机器学习 · 计算机科学 2021-09-07 Kun Zhai , Qiang Ren , Junli Wang , Chungang Yan

Mission critical systems deployed in data centers today are facing more sophisticated failures. Byzantine fault tolerant (BFT) protocols are capable of masking these types of failures, but are rarely deployed due to their performance cost…

分布式、并行与集群计算 · 计算机科学 2022-10-25 Guangda Sun , Xin Zhe Khooi , Yunfan Li , Mingliang Jiang , Jialin Li

After the pretraining stage of LLMs, techniques such as SFT, RLHF, RLVR, and RFT are applied to enhance instruction-following ability, mitigate undesired responses, improve reasoning capability and enable efficient domain adaptation with…

计算与语言 · 计算机科学 2025-10-17 Zhichao Wang , Andy Wong , Ruslan Belkin

This paper introduces a family of leaderless Byzantine fault tolerance protocols, built around a metastable mechanism via network subsampling. These protocols provide a strong probabilistic safety guarantee in the presence of Byzantine…

分布式、并行与集群计算 · 计算机科学 2020-08-25 Team Rocket , Maofan Yin , Kevin Sekniqi , Robbert van Renesse , Emin Gün Sirer

At PODC 2014, A. Most\'efaoui, H. Moumen, and M. Raynal presented a new and simple randomized signature-free binary consensus algorithm (denoted here MMR) that copes with the net effect of asynchrony Byzantine behaviors. Assuming message…

分布式、并行与集群计算 · 计算机科学 2023-01-24 Chryssis Georgiou , Ioannis Marcoullis , Michel Raynal , Elad Michael Schiller

Engineering LLMs to accelerate life sciences research requires a robust alignment with biomedical knowledge. We observe that biomedical text exhibits a fundamentally different uncertainty structure from general text: dense low-confidence…

Pretrained foundation models offer substantial benefits for a wide range of downstream tasks, which can be one of the most potential techniques to access artificial general intelligence. However, scaling up foundation transformers for…

机器学习 · 计算机科学 2024-06-21 Xingrun Xing , Li Du , Xinyuan Wang , Xianlin Zeng , Yequan Wang , Zheng Zhang , Jiajun Zhang

Given sufficient data from multiple edge devices, federated learning (FL) enables training a shared model without transmitting private data to the central server. However, FL is generally vulnerable to Byzantine attacks from compromised…

机器学习 · 计算机科学 2025-09-18 Youngjoon Lee , Jinu Gong , Joonhyuk Kang

Byzantine Fault Tolerant (BFT) consensus exhibits higher throughput in comparison to Proof of Work (PoW) in blockchains. But BFT-based protocols suffer from scalability problems with respect to the number of replicas in the network. The…

分布式、并行与集群计算 · 计算机科学 2019-04-30 Mohammad M. Jalalzai , Costas Busch , Golden Richard

Multi-Byzantine Fault Tolerant (Multi-BFT) consensus allows multiple consensus instances to run in parallel, resolving the leader bottleneck problem inherent in classic BFT consensus. However, the global ordering of Multi-BFT consensus…

分布式、并行与集群计算 · 计算机科学 2025-03-04 Hanzheng Lyu , Shaokang Xie , Jianyu Niu , Ivan Beschastnikh , Yinqian Zhang , Mohammad Sadoghi , Chen Feng

Consensus, abstracting a myriad of problems in which processes have to agree on a single value, is one of the most celebrated problems of fault-tolerant distributed computing. Consensus applications include fundamental services for the…

分布式、并行与集群计算 · 计算机科学 2023-11-16 Romaric Duvignau , Michel Raynal , Elad Michael Schiller