Government & Defense

Classified government and defense data carries the longest secrecy requirements of any sector - often 25 to 75+ years for intelligence, diplomatic, and strategy-related records. Because command centers, ministries, and national data centers are fixed sites joined by fiber, they are a natural fit for QKD. QKD also supports a sovereign security posture, with key material generated and kept on infrastructure the government physically controls.

As with the banking use case, the state-of-the-art implementation is a hybrid approach - combining QKD and PQC keys through a standardized key-derivation function. This keeps QKD additive to the post-quantum cryptography that national security agencies recommend as the certifiable baseline. For wide-area reach, keys are relayed across trusted nodes within the government's secured environment, scaling protection to metro, national, and allied networks.