Backup immutability is the protection of backup data from alteration or deletion for a defined period of time. It matters because recovery fails quickly when attackers can encrypt, delete, or quietly corrupt the very backups meant to save the organization.
What is Backup Immutability?
Immutable backups rely on technical or policy controls that prevent overwriting, shortening retention, or modifying stored backup content until the protected window expires. This is especially important against ransomware and insider abuse.
What Backup Immutability Commonly Supports
Common uses include ransomware resilience, recovery assurance, retention control, and backup tamper resistance.
Backup Immutability vs. Mutable Backup Storage
Backup immutability preserves recovery data against later manipulation. Mutable storage makes it easier for attackers or mistakes to destroy recovery options after compromise.
Frequently Asked Questions
Why are immutable backups important?
Because attackers increasingly target backups directly before or during extortion events.
Does immutability replace backup encryption?
No. They solve different problems and are strongest together.
