NIST SP 800-171 & CMMC 2.0 Control 3.1.21 Requirement:
Limit use of portable storage devices on external systems.
NIST SP 800-171 & CMMC 2.0 3.1.21 Requirement Explanation:
Portable storage devices include thumb drives, CDs, DVDs, external hard drives, and floppy disks. Because they are portable and can contain sensitive information such as and “Controlled Unclassified Information” (CUI) their use on external systems must be restricted. External systems include any system not managed by your company.
Example NIST SP 800-171 & CMMC 2.0 3.1.21 Implementation:
Write a policy restricting employees from using portable storage devices on external systems. Any exceptions to this policy must be approved by management.
NIST SP 800-171 & CMMC 2.0 3.1.21 Scenario(s):
- Scenario 1:
By policy, your company has banned the use of portable storage devices on external systems. John, an employee at your company needs to give a presentation at a client site. Due to technical restrictions at the client site he needs to present his power point slides off of a USB thumb drive. John reaches out to your security officer and receives permission to use a USB thumb drive to give his presentation. John is provided with an encrypted USB thumb drive to use for the presentation
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