An immutable backup is a secure backup copy of data that cannot be altered, deleted, or overwritten for a defined retention period, even by administrators or malicious actors. This write-once, read-many (WORM) approach ensures data remains tamper-proof and protected against threats like ransomware, accidental deletions, and unauthorized changes. Immutability is a key element of cyber resilience and regulatory compliance for enterprise backup and disaster recovery strategies.
See also: https://www.unitedlayer.com/disaster-recovery-as-a-service/
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