Final answer:
The authorized methods for transmitting confidential information to DoD contractors or non-DoD agencies within the U.S. and its territories include encrypted email, secure file transfer protocol (SFTP), and the Defense Information System for Security (DISS).
Step-by-step explanation:
The authorized method for transmitting confidential information to DoD contractors or non-DoD agencies within the U.S. and its territories is by using encrypted email. Encrypted email ensures that the content of the message is protected and only accessible by the intended recipient. It adds a layer of security to prevent unauthorized access to the confidential information.
In addition to encrypted email, another authorized method is using a secure file transfer protocol (SFTP). SFTP allows for the secure transfer of files over a network, ensuring that confidential information remains protected during transit.
Lastly, the Defense Information System for Security (DISS) is another authorized method for transmitting confidential information. DISS is a secure web-based application that allows for the exchange of sensitive information between DoD contractors and non-DoD agencies, providing end-to-end encryption and authentication.