What term describes a coded challenge or a response to a coded challenge in military communications?

The term that describes a coded challenge or a response to a coded challenge in military communications is "authenticate." In military contexts, authentication is crucial for ensuring that messages are received from legitimate sources and not from adversaries or unauthorized parties. This process involves a challenge-response mechanism where one entity sends a coded challenge and the receiving entity must provide the correct authenticated response to confirm their identity.

This security measure is vital for maintaining the integrity and confidentiality of military communications, especially in operations where secure and reliable information exchange is essential. Other options, while associated with military terminology, do not relate specifically to the process of confirming identity through coded challenges.