Protocol Berg v2: Non-local redundancy: Erasure coding and dispersed replicas for robust retrieval

Thu, Oct 2, 2025, 12:00 AM

In this presentation, we describe in detail how non-local redundancy is implemented in the Swarm peer-to-peer network. Among other things, we show how to apply classic Reed-Solomon erasure codes to files in Swarm, discuss security levels of data availability and derive their respective parameterisations, describe a construct that enables cross-neighbourhood redundancy for singleton chunks to complete erasure coding, and explore alternative retrieval strategies applicable to erasure-coded files and their impact on latency as well as price of retrieval. Protocol Berg v2 12-13 June 2025 Berlin https://v2.protocol.berlin