Mitsuaki will introduce you into blockchain security mechanisms for p2p networks. Firstly, Mitsuaki will introduce you to different p2p attacks that can slow down a p2p network.
Next, he will focus on explaining how to favour “well- behaving” peers to build a stable p2p network. Furthermore, he will explain how Lisk’s rating system works to select “well-behaving” peers.
A list of five metrics are used to decide whether a bad peer should be banned or not. These metrics include: latency, netgroup, productivity, longevity, and response rate. Moreover, each metric has been assigned a threshold that decides whether a peer should be evicted.
Lastly, Mitsuaki will explain the concept of peer bucketing to ensure that the peers are randomly selected from a collection with sufficient diversity. It’s a common problem in p2p networks where an attacker monopolises all the connections for a node, performing an Eclipse attack.
The above mechanisms should help you establish a more robust p2p network where well-behaving peers are favoured.