Glossary term
What is Tokenisation? Meaning for developers
Replaces sensitive data with a meaningless token. Example: Saved card = tok_9f3a…, not the real number.
Learn it properly · System DesignLesson 51: Encryption & Secrets ManagementUnencrypted traffic “inside our network”, an unencrypted backup in a public bucket, a database password pushed to GitHub. Where to encrypt in transit and at rest, who holds the keys, how envelope encryption and KMS work, end-to-end encryption, and how to store, deliver and rotate secrets.