When transmitting secret classified information, the following key requirements apply:
- Authorized Methods : Secret information must be transmitted using approved methods such as secure cryptographic systems authorized by the NSA, direct contact between cleared personnel, or designated courier services. These methods ensure the information is protected during transmission and only accessible to authorized recipients
- Use of Carriers : When transmitting Secret information via the U.S. Postal Service (USPS) or commercial carriers, the shipment must require a signature upon delivery to ensure receipt by an authorized person. The sender must verify the mailing address and ensure an authorized recipient is available to receive the package. Delivery to any person other than the addressee is prohibited, and external collection boxes cannot be used
- Prohibited Methods : Top Secret information cannot be transmitted via USPS or commercial carriers under any circumstances. Secret information requires more secure handling than Confidential but less restrictive than Top Secret
- Security Controls : The recipient must have the appropriate security clearance, a legitimate need-to-know, and secure storage capability for the Secret information. The sender must have authority to share the material
- Electronic Transmission : Electronic transmission of Secret information must use cryptographic systems authorized by the Director of the NSA or protected distribution systems meeting national security standards. This applies to voice, data, messages, and facsimile transmissions
- Marking and Handling : Packages and documents must be properly marked and handled according to classification level, ensuring they are not forwarded improperly and are returned if undeliverable
In summary, transmitting Secret classified information requires secure, authorized methods such as cryptographic systems or controlled courier delivery with receipt verification, ensuring both sender and receiver meet clearance and storage requirements, and strictly prohibiting insecure transmission methods like regular mail without safeguards
