Tag dossier
Badge records tagged with Cryptography, across Sweden, United States.
Propeller multicore IR puzzle and development badge
A Ryan Clarke-designed DEF CON 20 electronic badge manufactured by Parallax around the Propeller P8X32A multicore processor, infrared badge-to-badge communication, eight LEDs, USB programming, many physical variants, and a crypto/social badge challenge.
Non-electronic PCB playing-card puzzle badge
A Ryan Clarke-designed DEF CON 21 badge series built as poker-card printed circuit boards: non-powered identity artifacts whose copper, soldermask, silkscreen, inner-layer metal, role variants, and encoded face-card relationships formed a cryptographic and physical badge challenge.
Playable vinyl-record noir puzzle badge
A Ryan Clarke / 1o57-designed DEF CON 23 badge issued as an actual playable 7-inch vinyl record, with role-colored editions, printed mystery alphabets, inner-groove markings, lanyard ciphers, record audio, and a noir-themed badge challenge.
Electronic skull badge with Konami and serial puzzle paths
A Ryan Clarke / 1o57 DEF CON 24 electronic skull badge with a mini processor, buttons, LED eyes, printed codes, hidden-trace/silkscreen text, serial strings, lanyard data, conference-media files, and a badge challenge that used the Konami Code as an early visible hook.
UV-printed cyberpunk skyline CTF badge
A full-colour UV-printed Security Fest badge inspired by Gothenburg's skyline with a cyberpunk treatment, backside-mounted components, Micro-USB CTF interface, cryptography puzzles, and soldering-village LED personalization.
ESP32 portable CTF badge
BSides San Diego 2026 handed attendees a Cyberpunk Bunny electronic badge: an ESP32-powered portable CTF with cryptography challenges, wireless hacking, hidden secrets, an accelerometer-driven oracle, BLE co-op behavior, and an ultimate hidden flag path.