Defcon's new badge is a security key you can see inside

Ars Technica
By Kim Zetter, wired.comAug 1, 2026, 6:05 am126 pts
It’s been a longtime feature of the annual Defcon hacker conference that attendees come away not only with knowledge of new software vulnerabilities and hacking techniques but also an elaborately designed conference badge—often electronic masterpieces embedded with intricate puzzles, complex crypto…

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