Backup that cannot be modified or deleted for a specified period, protecting against ransomware.
Immutable backups cannot be altered, encrypted, or deleted—even by administrators—for a defined retention period. Immutability protects against ransomware that targets backup systems and against accidental or malicious deletion. Cloud backup services and modern backup appliances offer immutability features. Immutable backups ensure recovery capability even when attackers have administrative access.
Why It Matters
The DSC Perspective:
Immutability is essential ransomware protection. If attackers gain admin access, they can delete conventional backups. Immutable backups survive because they can't be deleted.