BSides San Diego
The April 4, 2026 America's Finest BSides edition whose official site and badge-challenge page document a Cyberpunk Bunny ESP32 electronic badge with portable CTF, accelerometer, cryptography, BLE co-op, and hidden flag behavior.
San Diego State University, San Diego, California · United States · 2026
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.
Lifecycle
The official guide documents a mystery encrypted message, D-pad decryption-method selection, classic-cipher basics, and advanced Base32, XOR, AES-128, and ChaCha20 challenges.
The badge's onboard accelerometer triggers hacker-themed Magic 8-Ball responses when the attendee gives it a firm shake.
The guide documents Bluetooth LE co-op mode for interacting with other attendees plus a secret shaking-sequence Easter egg tied to an ultimate flag and rainbow bunny-eye goal.
The official badge guide identifies the badge as a Cyberpunk Bunny PCB powered by an ESP32 and packed with cryptography, wireless hacking, and hidden secrets.
Operational history
The entry remains source-backed and image-free rather than copying official site imagery, screenshots, social media, or generated visuals.
The catalogue records verified badge behavior without inventing component-level electronics, source-release status, or shipped-hardware internals.