GDPR A.32(2): Pseudonymisation and Encryption Requirements
GDPR Article 32 mandates pseudonymisation and encryption as core security measures for personal data protection. Your organization must implement these controls at a level appropriate to the actual risk posed by your processing activities. Getting this right protects customers, demonstrates compliance intent, and reduces breach impact.
What this means
Pseudonymisation and encryption are two complementary security techniques required under GDPR Article 32. Pseudonymisation removes direct identifiers from data so it cannot be attributed to a data subject without additional information held separately. Encryption converts personal data into unreadable form using cryptographic keys, ensuring that even if data is compromised, it remains inaccessible without proper decryption keys. The standard requires you to implement these measures where they are appropriate—meaning your choice of encryption strength, pseudonymisation scope, and deployment should align with the sensitivity of the personal data and the risks inherent in your specific processing activities.
How to comply
- 1.Conduct a data protection impact assessment (DPIA) to identify which personal data requires pseudonymisation or encryption based on sensitivity and processing risk
- 2.Implement industry-standard encryption for personal data at rest (e.g., AES-256) on all systems storing customer or employee information
- 3.Enable encryption in transit (TLS 1.2+) for all data movement across networks and APIs
- 4.Establish pseudonymisation procedures for datasets used in testing, analytics, or non-production environments to minimize exposure of live personal data
- 5.Document your encryption key management process, including generation, rotation, storage, and access controls
- 6.Define which data elements require encryption vs. pseudonymisation based on your risk assessment and the nature of your processing
- 7.Test encryption and decryption processes regularly to ensure they function correctly and data can be recovered if needed
- 8.Train staff on data handling procedures and the importance of maintaining encryption keys securely
Evidence auditors look for
- Encryption policy document specifying which data types are encrypted, encryption algorithms used, and key rotation schedules
- Data inventory or register showing which personal data categories are subject to pseudonymisation or encryption controls
- Configuration screenshots or audit logs demonstrating encryption enabled on databases, file storage, and communications channels
- Key management procedure documentation including key generation standards, secure storage locations, and access restrictions
- Test results or penetration test reports confirming encryption is functioning and data remains unreadable without proper keys
- Records of encryption key rotation activities with dates and responsible parties
- Privacy impact assessment (DPIA) output justifying the encryption and pseudonymisation approach selected for specific processing
Frequently asked questions
When will FAQs be available?
The FAQ for this control is currently being prepared.
GRCWatch automatically tracks which data assets require encryption and pseudonymisation based on your processing inventory, generates audit-ready encryption configuration reports, and alerts you when encryption certificates or key rotation activities are overdue—so your security posture stays synchronized with GDPR requirements without manual spreadsheet tracking.
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