Under the General Data Protection Regulation (GDPR), Personally Identifiable Information is referred to as "personal data." GDPR defines personal data very broadly as any information relating to an identified or identifiable natural person. This includes online identifiers such as cookie IDs, IP addresses, and customer metadata.
Core Principles of GDPR Data Protection
If your application processes data of EU residents, your architecture must align with the seven key principles of GDPR:
- Lawfulness, Fairness, and Transparency: Clearly document how and why you process user data in a readable privacy policy.
- Purpose Limitation: Only collect data for specified, explicit, and legitimate purposes.
- Data Minimization: Limit data collection to what is strictly necessary in relation to the purposes for which they are processed.
- Accuracy: Maintain clean records and provide self-service tools for users to update their information.
- Storage Limitation: Delete or anonymize data once it is no longer required for its original purpose.
- Integrity and Confidentiality: Secure data using encryption, access controls, and regular vulnerability audits.
A SaaS Developer's GDPR Checklist
To ensure compliance at the database and API level, developers should implement database encryption, secure user sessions, audit trailing, and data masking. By redacting PII before it reaches server logs or customer support dashboards, companies significantly reduce the risk of compliance violations.