论文标题
联邦拜占庭协议系统中节点的中心性
Centrality of nodes in Federated Byzantine Agreement Systems
论文作者
论文摘要
联邦拜占庭协议系统（FBAS）是Mazières在2016年介绍的共识模型，在该模型中，参与的节点在概念上构成了一个网络，它们之间的链接由每个节点单独建立，从而以分散的方式建立。一个重要的问题是这些分散的决策是否导致整体分散网络。可以使用中心度度量评估网络中（DE-）集中化的水平。在本文中，我们考虑了三种不同的方法来获得FBA中的节点的中心度度量。其中两个基于基于图形和超图表到FBAS上下文的众所周知的措施。由于FBA的网络结构可能比（通常的）图或超图更复杂，因此我们还开发了一种新的，适应问题的中心度度量。这种新措施基于节点的完整性，该节点是FBAS模型的重要组成部分。我们说明了几个计算的示例中三种方法的优势和缺点。我们已经实施了所有中心度度量，并在Python套件恒星观测站中执行了所有计算。
The federated Byzantine agreement system (FBAS) is a consensus model introduced by Mazières in 2016 where the participating nodes conceptually form a network, with links between them being established by each node individually and thus in a decentralized way. An important question is whether these decentralized decisions lead to an overall decentralized network. The level of (de-)centralization in a network can be assessed using centrality measures. In this paper we consider three different approaches for obtaining centrality measures for the nodes in an FBAS. Two of them are based on adapting well-known measures based on graphs and hypergraphs to the FBAS context. Since the network structure of an FBAS can be more complex than (usual) graphs or hypergraphs, we also develop a new, problem-adapted centrality measure. This new measure is based on the intactness of nodes, which is an important ingredient of the FBAS model. We illustrate advantages and disadvantages of the three approaches on several computed examples. We have implemented all centrality measures and performed all computations in the Python package Stellar Observatory.
