Reference: CMMC 2.0
Level Introduced: 2
Title: Data at Rest
Protect the confidentiality of CUI at rest.
CUI at rest means information that does not move through the network and may be stored on hard drives, media, and mobile devices. Develop a scheme and implement the necessary security controls to protect the confidentiality of CUI at rest. Although an approved encryption method protects data stored at rest, there are other additional technical solutions. The scheme you choose should depend on your organization's environment and business needs.
You are an IT administrator at your organization responsible for protecting CUI at rest. Your company has a policy stating CUI must be protected at rest and you work to enforce that policy.
You research Full Disk Encryption (FDE) products that meet the FIPS encryption requirement. After testing, you roll out the encryption to all computers at your company to protect CUI at rest.
You are an IT administrator for your company. While you have used encryption to protect the CUI on most of the computers at your company, you have some devices that do not support encryption. Your company creates a policy requiring these devices to be signed out when needed, stay in possession of the signer when checked out, and to be signed back in and locked up in a secured closet when the user is done with the device. At the end of the day each Friday, you audit the sign-out sheet and make sure all devices are returned to the closet.