Secure Element · Hacker Con Badges

HITCON CMT 2018 · Taiwan · 2018

HITCON CMT 2018 HITCON Wallet Badge

Blockchain wallet badge with secure element, e-paper, Wi-Fi, and BLE

HITCON CMT 2018's official events page documents HITCON Wallet as a limited blockchain electronic badge for Royal VIP and Premium Pass holders, with secure-element cold-wallet functionality, electronic paper, Wi-Fi, and Bluetooth Low Energy. The same official page says holders could join a secret activity during the conference and later use the device as an offline physical wallet for Bitcoin or Ethereum.

HITCON Taiwan Taipei HITCON Wallet Blockchain Secure Element E-paper Wi-Fi Bluetooth LE HITCON Token East Asia Asia

39th Chaos Communication Congress · Germany · 2025

39C3 Critical Decentralization Cluster Badge

Open-hardware ESP32-S3 / TROPIC01 assembly badge and devboard

The Critical Decentralization Cluster's CDC Badge was presented as an electronic conference badge and development board at the completed 39th Chaos Communication Congress. The source-backed open-hardware platform combines an ESP32-S3, TROPIC01 secure element, front-lit e-paper display, twelve-button keypad, LiPo power path, and expansion ports, while public sources do not establish a conference-wide or admission-badge allocation.

39C3 Chaos Communication Congress Germany Critical Decentralization Cluster CDC Badge Assembly Badge Electronic Badge Open Hardware ESP32-S3 TROPIC01 Secure Element E-paper LiPo SAO Grove ESP-IDF

Onion DAO 2026 · United States · 2026

Onion DAO 2026 Hardware Badge

Open ESP32-S3 Chicago builder-festival hardware badge

Onion DAO's official 2026 Chicago festival page says every accepted attendee gets a hardware badge at registration, with most components already on the board and a final soldering step. The same official site links to OnionDAO's public oniondao-badge repository, which documents a hacker-conference-style ESP32-S3 design, optional RF/audio modules, a display socket, secure element, expansion ports, and source trees for hardware and software. The public record supports a real organizer-published artifact and design, while exact recipient allocation, completed assembly, and final attendee population remain unverified.

Onion DAO Null City Chicago Illinois United States ESP32-S3 ESP-IDF Arduino KiCad CERN-OHL-S MIT E-Paper TFT CC1101 Sub-GHz Secure Element Hardware Badge Builder Festival Cybersecurity North America