Encrypting PII in a Node.js app with WorkOS Vault

The tutorial outlines a method for encrypting personally identifiable information (PII) at the application layer before it reaches the database, using WorkOS Vault to manage encryption keys separately. This approach ensures that PII such as email addresses, phone numbers, and billing addresses are stored as encrypted objects in Vault, with only their Vault object IDs saved in the application database. By doing so, even if a database is compromised through SQL injection, internal queries, or misconfigured exports, the sensitive data remains secure and unreadable. The encryption keys are tied to each user's organization, providing an additional security boundary that ensures data from one tenant cannot be decrypted with another tenant's key. The tutorial provides a step-by-step guide to implementing this system in a multi-tenant SaaS application, covering the full CRUD lifecycle for user PII without requiring in-depth cryptographic knowledge. It leverages Vault's API to securely handle operations like storing, reading, updating, and deleting encrypted data while adhering to GDPR requirements for data erasure.

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