Add-on dossier
A linkable lifecycle record for hardware expansions, app ecosystems, firmware upgrades, cases, radio parts, and post-event badge experiments.
Released client code implemented a half-duplex RF broadcast chat system for badges using RFCat, 868 MHz operation, sync words, modulation settings, queues, and retransmission.
Badge context
Secondary event-context listing for the December 2, 2017 Cape Town date, venue, and BSides Cape Town website pointer.
First-hand SensePost writeup documenting the two-part 2017 badge hardware, CC1111/RFCat RF badge, ESP flux-capacitor badge, RF chat idea, and challenge flow.
Public gist containing the RF chat client, challenge server, XOR helper, RF parameters, hint flow, and expected solve path for the badge challenge.
Source trail
Primary released challenge-code source for RF settings, challenge-server behavior, player-state persistence, periodic hints, XOR helper, and intended badge solve path.
Secondary event-context source for date, Cape Town venue, and the public 2017 event listing.
First-hand source for the 2017 two-part badge hardware, flux-capacitor ESP badge, red CC1111 RF badge, RFCat challenge, RF chat behavior, challenge box, and solve flow.