Alaina needs to physically secure the root encryption keys for a certificate authority. What type of security device should she use to maintain local control and security for them?

Alaina’s need for a local, secure storage area is an ideal situation for the use of a vault or safe where the keys can be stored on a device like a thumb drive. Simply placing them on a drive leaves them vulnerable to theft, and an air-gapped system would also be potentially exposed to theft or local breaches.