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GossipSub: Attack-Resilient Message Propagation in the Filecoin and ETH2.0 Networks

Lightningat FOSDEM 2021 · on Saturday, 2021-02-06· at 15:20· L.lightningtalks· [peer-to-peer, networking]

speaker

name:Yiannis Psaras

website:https://probelab.io

resources

video:https://video.fosdem.org/2021/L.lightningtalks/gossipsub.mp4

slides:https://fosdem.org/2021/schedule/event/gossipsub/attachments/slides/4641/export/events/attachments/gossipsub/slides/4641/GossipSub_Slides

summary

GossipSub is a gossip-based pubsub protocol designed for permissionless blockchains (Filecoin and ETH2.0) to provide fast, low-bandwidth, and attack-resilient propagation of block and transaction messages. It combines an eager-push mesh to keep fan-out low and speed high, a lazy-pull gossip layer to reach distant or out-of-mesh nodes, peer scoring to prefer well-behaved nodes, and several Sybil-targeted mitigation strategies; the protocol was evaluated on a 5,000+ VM AWS testbed and is being integrated into Filecoin and ETH2.0.

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