What type of communication involves safeguarding sensitive information?

Classified communication is specifically designed to safeguard sensitive information that, if disclosed, could harm national security or other important interests. This type of communication ensures that only individuals with the appropriate security clearance have access to the information, thereby maintaining confidentiality and preventing unauthorized disclosure. This contrasts with the other types of communication listed. Open communication generally refers to the free exchange of information without restrictions, which does not prioritize the safeguarding of sensitive information. Clear communication focuses on ensuring that messages are conveyed in an understandable manner, while inferred communication relies on implied messages rather than direct communication, both of which do not inherently involve the protections required for sensitive information.