DAF COMSEC Form 4167: TPC COMSEC Inventory

DAF COMSEC Form 4167: TPC COMSEC Inventory – Two-Person Control (TPC) remains a cornerstone of Communications Security (COMSEC) programs in the Department of the Air Force (DAF) and broader U.S. Department of Defense (DoD). DAF COMSEC Form 4167, officially titled Two-Person Control (TPC) COMSEC Material Inventory, provides the standardized tool for documenting and verifying accountability of sensitive COMSEC materials that require strict dual-person oversight.

U.S. military units, COMSEC managers, custodians, and security personnel use this form to maintain rigorous control, reduce the risk of compromise, and ensure compliance with DAF and DoD security directives.

What Is Two-Person Control (TPC) in COMSEC?

Two-Person Control (TPC) requires at least two authorized, cleared individuals to be present and actively involved whenever handling, accessing, inventorying, transporting, or destroying designated high-sensitivity COMSEC materials. Neither person can complete the action alone. This principle prevents unauthorized access, accidental misuse, or malicious compromise by a single individual.

TPC applies primarily to the most critical cryptographic items—such as certain keying material, authenticators, or equipment—where a lone-person breach could endanger national security, nuclear command and control, or other protected communications. It aligns with broader DoD two-person concepts seen in nuclear surety and high-security environments.

Key benefits of TPC include:

  • Enhanced detection of incorrect or unauthorized actions.
  • Built-in witnessing and dual verification.
  • Stronger audit trails for accountability.

Purpose of DAF COMSEC Form 4167

The form serves as a comprehensive inventory checklist and accountability record specifically for COMSEC material under TPC requirements. It documents:

  • Detailed listings of TPC-controlled items.
  • Serial numbers or identifiers.
  • Inventory dates and results (e.g., present, missing, condition).
  • Signatures and certifications from both persons involved.

Using Form 4167 helps units:

  • Prove continuous accountability during routine or special inventories.
  • Support investigations into potential compromises.
  • Demonstrate compliance during inspections by higher headquarters, the National Security Agency (NSA), or oversight bodies.

It functions as both a working inventory sheet and a formal record that can be retained for audit purposes.

When and Why Use DAF Form 4167?

Use the form whenever performing inventories of COMSEC material designated for TPC. Frequency typically follows the governing COMSEC account procedures (often semi-annual, monthly, or upon specific events such as change of custodian, receipt/transfer, or suspected incidents). Always consult the latest DAFI 31-118 (Security Forces Standards and Procedures), DoDI 8523.01 (COMSEC), and your local COMSEC Account SOP for exact requirements.

TPC and Form 4167 usage is mandatory for materials where policy dictates dual control to mitigate insider threats and ensure no single point of failure in safeguarding.

Responsible parties usually include:

  • COMSEC Managers and Account Custodians.
  • Alternates or designated witnesses.
  • Two cleared and trained personnel (often with specific COMSEC training and need-to-know).

Both individuals must verify the material’s presence, condition, and proper storage (e.g., in approved safes or containers) and jointly certify the inventory.

How to Complete DAF COMSEC Form 4167?

Although the official fillable PDF is hosted on the Air Force e-Publishing site, here is a general overview of typical sections (always use the current version from official sources):

  1. Header Information: Unit designation, COMSEC account number, inventory date/time, and period covered.
  2. Material Listing: Item description, short title, edition, serial/quantity, storage location, and remarks.
  3. Inventory Results: Columns or blocks for “Verified Present,” discrepancies, or corrective actions.
  4. Certification Block: Printed names, ranks/positions, signatures, and dates of the two personnel performing the inventory. One may serve as the primary custodian and the other as the witness.
  5. Reviewer/Manager Approval: Space for the COMSEC Manager or higher review.

Best practices:

  • Conduct inventories in a secure area with no distractions.
  • Physically sight each item (do not rely on memory or previous records alone).
  • Clearly document any shortages, damage, or irregularities and immediately report per policy.
  • Retain completed forms according to records disposition schedules.

Download the Official Form: Access the current DAF COMSEC Form 4167 directly here: https://static.e-publishing.af.mil/production/1/saf_cn/form/dafcomsecform4167/dafcomsec4167.pdf. Ensure you have a compatible PDF viewer (Adobe Reader recommended). Always pull the latest version from the official Air Force e-Publishing website to guarantee currency.

  • DoDI 8523.01 — Communications Security (COMSEC) program requirements.
  • DAFI 31-118 and associated guidance memorandums — Security procedures applicable to DAF and USSF.
  • NSA Central Office of Record (COR) guidance for COMSEC accounts.
  • Local unit COMSEC Standard Operating Procedures (SOPs).

Personnel handling TPC material must meet strict eligibility criteria, including appropriate security clearance, training, and often enrollment in relevant reliability or access programs.

Common Compliance Challenges and Tips

  • Scheduling: Coordinate dual-person availability without disrupting operations.
  • Training: Ensure both individuals understand TPC rules and the specific form fields.
  • Documentation: Incomplete signatures or missing details are frequent findings during audits.
  • Destruction/Transfer: Use the form (or supporting records) when witnessing destruction or hand-off of TPC items.
  • Record Retention: Maintain inventories as required for potential review by inspectors.

Regular functional reviews of COMSEC accounts, including TPC holdings, help maintain readiness and prevent violations.

Conclusion: Strengthening COMSEC Through Rigorous TPC Practices

DAF COMSEC Form 4167 is more than administrative paperwork—it is a critical control that reinforces the integrity of U.S. military communications security. Proper use of Two-Person Control and accurate inventory documentation protect sensitive cryptographic material from compromise and support the overall national security mission.

For U.S. Air Force, Space Force, and supporting DoD personnel: Always reference the most current official publications on the Air Force e-Publishing site and coordinate with your local COMSEC manager for account-specific guidance. Staying current with evolving DAFI and DoDI requirements ensures your unit remains inspection-ready and operationally secure.

Need the form? Download it directly from the official source linked above and incorporate it into your unit’s COMSEC program today.

This article is for informational purposes and does not replace official policy or training. Personnel should consult their chain of command, COMSEC manager, and the latest Department of the Air Force instructions for authoritative direction.