Reorg resilience describes a blockchain network’s ability to resist and recover from reorganizations, where previously confirmed blocks are replaced by an alternative chain history. High resilience minimizes the risk of transactions being reversed or censored after initial confirmation. It is a critical security property that ensures the finality and trustworthiness of the ledger. Robust resilience protects against malicious attacks and network instability.
Context
The state of reorg resilience is a significant consideration for all proof-of-work and proof-of-stake blockchains, with ongoing research into improving this aspect. A key debate involves the balance between confirmation speed and the depth of chain history required to consider a transaction truly final. Future developments will likely include stronger finality gadgets, improved block propagation mechanisms, and enhanced economic penalties for malicious chain reorg attempts. Strengthening resilience is vital for reliable decentralized operations.
Goldfish introduces a novel coordination mechanism for PoS, using message buffering to ensure reorg resilience and fast, secure confirmation in dynamic validator sets.
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