Reference:
A key vault is a service that provides secure storage and management of keys, secrets, and certificates. It can be used to store credentials used to publish production software to the container registry in a secure location, and restrict access to the pipeline service account without allowing the third-party developer to read the credentials directly. A TPM (trusted platform module) is a hardware device that provides cryptographic functions and key storage, but it is not suitable for storing shared credentials. A local secure password file is a file that stores passwords in an encrypted format, but it is not as secure or scalable as a key vault. MFA (multi-factor authentication) is a method of verifying the identity of a user or device by requiring two or more factors, but it does not store credentials. Verified Reference: https://www.comptia.org/blog/what-is-a-key-vault https://partners.comptia.org/docs/default-source/resources/casp-content-guide