Add-on dossier
A linkable lifecycle record for hardware expansions, app ecosystems, firmware upgrades, cases, radio parts, and post-event badge experiments.
The 2019 badge challenges used blinked binary, silkscreen encoding, badge-role variants, SSRF, and a Docker-hosted challenge app.
Badge context
University of Nebraska-Lincoln announcement source for April 5-6, 2019 dates, Embassy Suites Omaha Downtown Old Market venue, and limited electronic badge availability.
Public ZonkSec repository preserving the ATtiny85, CR2032, APA102, LED-mode, and Docker CTF challenge details.
ZonkSec retrospective corroborating the 2019 K badge hardware, power switch, momentary button, CTF blink behavior, and project team context.
Source trail
Project-owner retrospective corroborating 2019 badge concept, programming role, power switch, mode button, and CTF blink challenges.
Primary source for ATtiny85, CR2032 battery slots, five APA102 LEDs, LED modes, binary blink behavior, secret mode, badge-role variants, and Docker CTF challenge flow.