DEF CON

DEF CON 23

The 2015 DEF CON edition whose official Ryan Clarke / 1o57 badge went fully analog as a playable 7-inch vinyl record with lanyard ciphers, groove clues, role colors, audio clues, and a noir badge challenge.

Paris Hotel and Bally's Hotel, Las Vegas, Nevada · United States · 2015

DEF CON 23 Badge badge image

DEF CON 23 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.

Lifecycle

Add-ons & Upgrades

DEF CON 23 Badge historical

analog challenge

Playable record clue surface

The official badge was a playable vinyl record, making audio playback and record inspection part of the badge-hacking surface instead of firmware or active electronics.

Compatibility: DEF CON 23 Badge

DEF CON 23 Badge historical

cipher material

Nyctograph and Gold Bug lanyards

The badge challenge used six lanyards carrying Lewis Carroll Nyctograph symbols and Poe Gold Bug cipher material that translated into early-stage secret messages.

Compatibility: DEF CON 23 Badge

DEF CON 23 Badge historical

event puzzle

Noir key-card trail

Public writeups and attendee recaps describe DEF CON 23 key-card material as part of the noir-themed badge challenge trail.

Compatibility: DEF CON 23 Badge

Operational history

Issues & Camp Impact

Resources

Sources