Which feature allows Vault to provide credentials on-demand?

The feature that allows Vault to provide credentials on-demand is Dynamic Secrets. This capability is fundamental to how Vault operates, as it generates secrets in real-time when they are requested. Instead of storing static credentials that can become compromised, dynamic secrets are created for immediate use and have defined lifetimes, meaning they expire after a certain period or after being used. This approach enhances security by ensuring that credentials are not only unique but also temporary, reducing the risk associated with credential leaks.

For example, when an application requests database access, Vault can generate a unique set of database credentials that are only valid for a limited time, ensuring that even if those credentials are exposed, they cannot be exploited indefinitely. This on-demand aspect of dynamic secrets is crucial for environments that prioritize security and agility, providing a robust method for managing sensitive information while minimizing the attack surface.