GDPR Article: Art. 25 – Controller shall implement technical & organizational measures for data protection by design and default.

How to Implement: Integrate privacy & security requirements from outset: threat modelling, minimize data collected, default minimal access, embed encryption, logging, anonymization.

GDPR Article: Art. 32 – Controller & processor must implement appropriate technical & organizational measures: pseudonymization, encryption, restore availability, regularly assess.

How to Implement: Encrypt personal data at rest and in transit, use strong authentication/authorization (MFA, password complexity), use secure development lifecycle (SDLC), conduct regular vulnerability testing, ensure incident response & backup for availability.

GDPR Article: Art. 5 (1 – b/c/e) – Personal data shall be collected for specified legitimate purposes, adequate, relevant & limited.

How to Implement: Define and enforce data collection scopes, restrict fields to what is needed, show purpose in UI, implement validation rejecting unnecessary fields, revoke access when not needed.

GDPR Article: Art. 5 (1-d) – Personal data shall be accurate and kept up to date

How to Implement: Provide UI for users to update/correct their data, perform regular data quality checks, implement processes for flagging stale data, audit logs for modifications.

GDPR Article: Art. 5 (1-e) – data kept in identifiable form no longer than necessary; and Art. 17 – Right to erasure/”right to be forgotten”.

How to Implement: Implement retention policies such as archiving/deletion workflows. Ensure UI or automated capability is provided to delete data. Anonymize rather than keep identifiably long log deletion events.

GDPR Article: Art. 5 (1-f) – Data processing shall be done in a manner that ensures appropriate security; and & Art. 32– Security of processing.

How to Implement: Use secure coding standards, protect against OWASP Top 10, enforce encryption, role-based access control, audit trails, monitor for unauthorized access, regular penetration tests.

GDPR Article: Art. 24 – Responsibility of controller; and Art. 30 – Records of processing activities.

How to Implement: During development, maintain documentation of processing operations such as data flow diagrams, data inventories, integrate logging/metrics, version control of design, evidence of security/privacy reviews, compliance checklists.

GDPR Article: Art. 28 – Processor; and Art. 32 – Security.

How to Implement: When using third-party services or APIs, conduct vendor security assessment, ensure contract mandates GDPR compliance, ensure data flows secure, monitor third-party access, define deletion/return of data.

GDPR Article: Art. 44-50 – Transfers of personal data to third countries or international organizations.

How to Implement: Ensure any data exported outside EU has adequate safeguards (standard contractual clauses), encrypt data in transit, design architecture so EU data stays within region where required, log/monitor cross-border flows.

GDPR Article: Art. 12-23 – Rights of the data subject.

How to Implement: The web application must have a feature that allows users to access to their data (view, download), correct, delete, restrict processing; expose APIs for data portability; audit requests; consent management.