Cybersecurity
Disaster Recovery and Business Continuity
Understanding how organizations prepare for cyber incidents, system failures, disasters, and disruptions while maintaining critical operations and recovering securely.
Understanding Disaster Recovery and Business Continuity
Organizations depend on information systems, applications, networks, databases, cloud services, and other digital infrastructure to deliver their services. A cyberattack, hardware failure, software problem, natural disaster, power outage, or other disruption can affect these systems and interrupt normal operations.
Business continuity and disaster recovery help organizations prepare for these situations. Business continuity focuses on maintaining critical business functions during a disruption, while disaster recovery focuses primarily on restoring systems, applications, data, and technology services after an incident.
Business Continuity vs Disaster Recovery
Business continuity and disaster recovery are closely related but address different aspects of organizational resilience.
Business Continuity
Focuses on keeping critical organizational functions operating during and after a disruption.
- Identify critical business functions
- Develop continuity procedures
- Define alternative operating arrangements
- Maintain essential services
- Coordinate people and resources
Disaster Recovery
Focuses on restoring technology systems, applications, data, and infrastructure following a disruptive event.
- Restore systems and applications
- Recover data from backups
- Rebuild affected infrastructure
- Validate recovered systems
- Return services to normal operation
Why Resilience Matters
A security incident does not necessarily end when an attacker is removed or a technical problem is fixed. Organizations also need to restore services and continue delivering important functions. Resilience therefore requires preparation before an incident occurs.
Reduce Downtime
Prepared recovery procedures can help organizations restore important services more efficiently.
Protect Critical Data
Backups and recovery procedures help protect important information from loss or disruption.
Maintain Operations
Continuity planning helps organizations maintain essential services during disruptive events.
Business Impact Analysis
Business Impact Analysis, or BIA, helps an organization understand which business functions are most important and what could happen if those functions are disrupted.
A BIA can help identify critical services, dependencies, potential impacts, recovery priorities, and the resources required to restore operations.
Backup and Data Recovery
Reliable backups are an important part of disaster recovery. Backups provide organizations with a way to restore information following accidental deletion, hardware failure, malware incidents, ransomware, or other forms of data loss.
Regular Backups
Create backups according to the organization's recovery requirements and data criticality.
Backup Protection
Protect backups from unauthorized access, modification, and deletion.
Recovery Testing
Regularly test restoration procedures to verify that backups can actually be recovered when needed.
RTO and RPO
Recovery planning often uses Recovery Time Objective (RTO) and Recovery Point Objective (RPO) to define recovery expectations.
Recovery Time Objective
RTO represents the targeted amount of time within which a system, service, or business function should be restored following a disruption.
Recovery Point Objective
RPO represents the targeted point in time to which data should be recoverable following a disruption.
Disaster Recovery Strategies
Organizations can use different recovery approaches depending on their technology environment, operational requirements, available resources, and recovery objectives.
Backup and Restore
Restore systems and information from available backups after a disruption.
Redundant Systems
Use additional systems or infrastructure to provide continuity when primary resources become unavailable.
Cloud Recovery
Use cloud infrastructure and services to support backup, recovery, or alternative operating environments.
Alternative Facilities
Use alternative locations or facilities when the primary operating environment is unavailable.
Incident Response and Recovery
Disaster recovery and incident response are closely connected. Incident response focuses on managing and containing a security incident, while recovery focuses on restoring affected systems, services, and operations.
Testing and Exercises
A recovery plan should not simply exist as a document. Organizations need to test their procedures to identify gaps and verify that people, technology, communication channels, and recovery processes work as expected.
Tabletop Exercises
Teams discuss a simulated disruption and walk through their planned response.
Technical Testing
Technical teams test backup restoration, system recovery, and other technical procedures.
Full Exercises
Organizations can conduct more comprehensive exercises to evaluate their overall recovery capabilities.
Building Cyber Resilience
Cyber resilience is the ability of an organization to continue operating, withstand disruption, recover from incidents, and adapt based on lessons learned. It combines preventive security controls with detection, response, recovery, and continuous improvement.
- Identify critical systems and business functions.
- Protect important systems and information.
- Maintain reliable and protected backups.
- Establish clear incident response and recovery procedures.
- Test recovery plans regularly.
- Continuously improve based on incidents and exercises.
Example: Recovering from a Cyber Incident
Consider an organization whose critical server becomes unavailable following a cybersecurity incident. A coordinated response could involve the following activities:
Key Takeaways
- Business continuity focuses on maintaining critical operations during disruptions.
- Disaster recovery focuses on restoring systems, data, applications, and technology services.
- Business Impact Analysis helps identify critical services, dependencies, impacts, and recovery priorities.
- Reliable and protected backups are an important part of recovery planning.
- RTO and RPO help define recovery expectations for systems and information.
- Recovery plans should be tested regularly to identify weaknesses and improve organizational resilience.
- Cyber resilience combines prevention, detection, response, recovery, and continuous improvement.