How do ESPs handle sensitive data storage?

ESPs handle significant volumes of personal data: email addresses, names, behavioral data, and potentially sensitive attributes. Responsible handling requires multiple protection layers.

• Encryption:
• Data encrypted at rest using strong algorithms (AES-256)
• Key management with rotation and access controls
• TLS for all data in transit
• Encrypted backups
• Access controls:
• Role-based access (employees see only what their job requires)
• Authentication requirements for all access
• Audit logging of data access
• Regular access reviews and revocation
• Infrastructure security:
• Network segmentation isolating sensitive systems
• Intrusion detection and prevention
• Regular security assessments and penetration testing
• Vulnerability management and patching
• Compliance frameworks:
• SOC 2: Security, availability, processing integrity controls
• ISO 27001: Information security management
• GDPR: EU data protection requirements
• HIPAA: Healthcare data handling (for applicable ESPs)
• Data minimization:
• Collect only necessary data
• Retention policies to delete old data
• Anonymization where full data isn't needed

Ask your ESP about their certifications and security practices. Reputable providers publish security documentation and undergo regular audits.