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Redundancy measures for identity data include multi-region cloud deployments (AWS, Azure), erasure coding for distributed storage, and RAID configurations for on-premise servers. Blockchain networks replicate data across consensus nodes (e.g., Ethereum’s 15,000+ validators). Decentralized storage (IPFS, Filecoin) uses content addressing to ensure availability. Regular backups to geographically isolated sites (e.g., primary in US, secondary in EU) protect against regional outages.

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