For decades, backup was an infrastructure concern. The storage team managed tape libraries, backup servers, and retention policies. The CISO focused on firewalls, intrusion detection, and access controls.

That separation no longer makes sense. In 2026, data protection is a security function — and the CISO needs to own it.

Why the Shift Happened

Three forces converged to move backup from the storage stack to the security stack:

Ransomware changed the game. When attackers started targeting backup infrastructure specifically, backup became a security issue overnight. A backup that can be encrypted or deleted by ransomware is not a backup — it's a false sense of security.

Cloud dissolved the infrastructure boundary. In the cloud, there's no "storage team" managing physical hardware. Data protection is a policy and configuration issue, not a hardware issue. And policy is a security function.

Regulators noticed. Compliance frameworks increasingly treat backup and recovery as security controls, not operational procedures. Auditors want to see backup under the security governance umbrella.

What CISOs Need to Know

Your backup is a target. Sophisticated attackers research your backup infrastructure during reconnaissance. They identify backup schedules, retention periods, and storage locations before launching their attack. The goal is to destroy your ability to recover before you even know you've been compromised.

Immutability is not optional. Every backup copy must be immutable — unable to be modified or deleted, even by administrators. This is your last line of defense when everything else fails.

Air gaps still matter. Logical separation is good. Physical separation is better. At least one copy of your critical data should be completely offline and unreachable from any network.

Recovery time IS security posture. How fast you can recover determines how long an incident impacts your business. A 2-week recovery time is a 2-week outage. That's not just an operations problem — it's a business survival problem.

Test adversarially. Don't just test that backups restore. Test that backups restore when the backup admin's account has been compromised. Test that backups restore when the primary data center is unavailable. Test the worst case, not the easy case.

The Budget Conversation

CISOs typically have more budget flexibility than infrastructure teams. Moving backup under security opens new funding possibilities:

Building Your Security-First Backup Strategy

1. Inventory all backup infrastructure and assess it through a security lens
2. Implement immutable storage for all backup copies
3. Separate backup credentials from production credentials
4. Add backup infrastructure to your security monitoring
5. Include backup compromise scenarios in your incident response plan
6. Brief the board on backup as a security control, not just an operational expense

The CISO who owns data protection is the CISO who can guarantee recovery. And in 2026, guaranteed recovery is the ultimate security capability.