Add-on dossier
A linkable lifecycle record for hardware expansions, app ecosystems, firmware upgrades, cases, radio parts, and post-event badge experiments.
The DEF CON 27 badge game used near-field magnetic induction badge interactions and role-specific badge types to advance through DEFCON letter levels.
Badge context
Context article on Joe Grand's return, badge aesthetic, high-volume DEF CON context, and the official crystal-badge story.
NXP guide documenting KL27/Kinetis hardware, programming setup, firmware source, schematics, tools, and hacking paths.
Grand Idea Studio source for DEF CON 27 badge project files, firmware, fixtures, community resources, and NFMI/security-research links.
Independent technical writeup for KL27P64M48SF2, NXH2261UK NFMI, SWD/UART, firmware building, and chameleon firmware approach.
Source trail
Context source for Joe Grand's return to official DEF CON badge design, crystal-badge framing, and conference-scale badge culture.
Primary project source for official files, firmware, fixtures, linked hacking projects, NFMI security research, and badge-game framing.
Image-provenance source for the official DEF CON 27 badge photo published on the Grand Idea Studio project page; the page states that all designs are distributed under Creative Commons Attribution 4.0 International.
Primary technical guide for NXP KL27 hardware, programming workflow, firmware source, schematics, tools, and component details.
Technical writeup source for KL27P64M48SF2, NXH2261UK NFMI, badge-type byte behavior, UART/SWD paths, firmware build changes, and chameleon firmware.