What is the preferred method for transporting an SCI document between SCIFs?

The preferred method for transporting an SCI document between Sensitive Compartmented Information Facilities (SCIFs) is the Defense Courier Service (DCS). The DCS is specifically designed to handle sensitive materials, including SCI, ensuring that these documents are securely and efficiently delivered. This service employs trained couriers who are familiar with the requirements for handling classified information and adhere to strict security protocols during transit.

DCS is equipped to manage the unique risks associated with the transportation of sensitive materials, providing tracking and safeguarding measures that are not typically available through other methods. Furthermore, DCS is authorized to operate within the security frameworks established for the transport of classified information, thereby reducing the risk of unauthorized access or compromise.

While other methods such as Military Delivery Service or commercial shipping may have their own uses, they do not meet the stringent security criteria necessary for transporting SCI documents. Internal mail systems may lack the required oversight and security needed for classified documents, making them unsuitable for SCI transport.