Which system is used to transmit classified information if not processed through a cryptographic system?

The Protected Distribution System (PDS) is specifically designed to transmit classified information securely, particularly when it is not being processed through a cryptographic system. A PDS typically consists of physical pathways, such as secure cables or conduits, that protect sensitive data during transmission by minimizing exposure to interception and unauthorized access. It is important in safeguarding classified communications by ensuring that the physical medium through which the information travels is secure.

The relevance of the PDS in the context of classified information lies in its capability to provide a controlled environment that adheres to stringent security standards, which is essential for the transmission of such sensitive data. In instances where cryptographic protocols are not applied, the PDS functions as an additional layer of security.

Other systems mentioned may serve valuable purposes but do not specifically address the secure transmission of classified information without cryptography, which is a critical requirement for PDS functionality.