An electronic badge (or electronic conference badge) is a gadget that is a replacement for a traditional paper-based badge or pass issued at public events.
[1] It is mainly handed out at computer (security) conferences and hacker events.
[2] Their main feature is to display the name of the attendee, but due to their electronic nature they can include a variety of software.
The badges were originally a tradition at DEF CON, but spread across different events.
[3] The organization badge.team has developed a platform called "Hatchery"[9] to publish and develop software for several badges.