Which factor does NOT contribute to the selection of a crypto key for a network?

The factor that does not contribute to the selection of a crypto key for a network is employment of dedicated timeslot reuse. Selection of crypto keys primarily involves considerations related to security, operational needs, and the participants involved in the communication network.

The process of selecting crypto keys is aimed at ensuring secure communications, focusing on factors such as the specific requirements of the operational and training environments, the service affiliation and nationality of participants—which can influence compatibility and security protocols—and the need for deconfliction among Joint Tactical Information Distribution System (JTIDS) and Multifunctional Information Distribution System (MIDS) networks, which pertains to managing the different frequencies and avoiding interference.

Timeslot reuse, however, relates more to network efficiency and resource allocation rather than the selection of cryptographic methods or keys. While timeslot management is crucial for maintaining a well-functioning network, it does not play a role in determining which crypto key is appropriate or secure for communication among participants.