Security Fest
The Swedish Security Fest edition with the Feskekôrka Piano Badge, a music-and-airship CTF badge documented through Hackster and Hackerware build notes.
Gothenburg · Sweden · 2024
A Security Fest 2024 badge shaped around Gothenburg's Feskekôrka fish-market landmark, with piano/touch-key gameplay, an airship story CTF, LEDs, USB-C serial interaction, and documented attendee/speaker/crew variants.
Lifecycle
Hackerware documents sticking a mini speaker on the backside and soldering its leads at LS1 to play the piano.
The badge CTF is framed as an airship journey with touch-key and serial navigation, games, riddles, and harder crypto, reverse-engineering, and memory-corruption challenges.
Hackerware documents replacing C1 and C2 with 22 pF capacitors, then adding SMD LEDs and resistors at D9-D13 and R8-R12 to play the CTF and unlock airship lights.
Operational history
The record captures the real operational work behind the polished attendee artifact and preserves a useful production failure mode for future badge teams.
The Sweden record remains source-backed and image-free rather than copying source-page media, documentation screenshots, event photos, social media, placeholders, or generated approximations.
The badge intentionally blurs software play with hands-on hardware rework; the compendium tracks that as a lifecycle/challenge caveat.