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While my big picture answer to this question is let's talk about how implementing a master data management plan will protect you as much as humanly possible. Here are 7 more tactical answers to your question:

1. Implement Multi-Layered Security
   • Adopt a comprehensive cybersecurity strategy that includes prevention, protection, and response capabilities 3
   • Use firewalls, antivirus software, and intrusion detection systems
2. Regular Software Updates and Patch Management
   • Ensure all systems and software are regularly updated to address known vulnerabilities
3. Employee Training and Awareness
   • Educate staff about phishing attacks and other social engineering tactics (it is quite possible that the CDK hack started within a dealership somewhere)
   • Implement strict password policies and multi-factor authentication
4. Data Backup and Recovery Plans
   • Maintain regular, secure backups of critical data
   • Develop and test disaster recovery plans to ensure quick restoration of services
5. Third-Party Risk Management
   • Carefully vet software providers and other vendors for their security practices
   • Consider using multiple providers to avoid single points of failure
6. Network Segmentation
   • Isolate critical systems and limit access to sensitive data
7. Incident Response Planning
   • Develop and regularly update an incident response plan
   • Conduct tabletop exercises to practice responding to potential cyberattacks