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There Is No Swarm in a Drone Light Show: 200 Aircraft Share One Integer

Grepping all 9,199 lines of Skybrush's open-source light-show firmware for neighbour, collision and swarm turns up nothing: no aircraft knows another exists, and the entire content two hundred of them synchronise is one GPS time-of-week integer plus a millisecond offset, with collision avoidance settled on the ground in the choreography software. Chapter 7 of Taiwan's drone cybersecurity spec — the swarm chapter — leaves the 'drone' column a dash down all twelve items and tests switches and routers instead.

Taiwan's Drone Security Spec: The Five Items That Test Resilience Are Optional

Reading the whole specification turns up three counter-intuitive things: of the seven mandatory items only three sit on the aircraft and the rest on the ground control station; an unencrypted link still passes, as long as the manual or the box states the reason or the risk — the rule asks for disclosure, not encryption; and the five items that actually test resilience (spoofing, jamming, link loss, known firmware vulnerabilities, app certification) are all in Chapter 8, which is optional.