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Redundancy measures for identity data include multi-region cloud deployments (e.g., AWS Availability Zones), decentralized storage (e.g., IPFS, Filecoin), and on-premise backups. Blockchain ledgers replicate data across nodes to prevent single points of failure. Erasure coding splits data into fragments with parity checks, enabling reconstruction from partial subsets. Regular snapshots and versioning ensure recoverability, while encryption (e.g., AES-256) protects data at rest. Compliance standards (e.g., SOC 2) mandate redundancy testing and failover drills.
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