# DC34 CTF — DEF CON 34 Capture the Flag

> DEF CON 34 Capture the Flag (iPhone/iPad app by Jeremy Yablan.)

- Source: https://appshunter.io/ios/app/dc34-ctf/id6784302919 (this page in markdown: same URL + `.md`)
- Developer: [Jeremy Yablan](https://appshunter.io/developer/1781747583)
- Category: Games
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 6 MB
- Languages: American English
- Released: 2026-07-17
- Data updated: 2026-08-05
- User reviews in markdown: https://appshunter.io/ios/app/dc34-ctf/id6784302919/reviews.md

## What is DC34 CTF?

DC34 CTF is a capture-the-flag game built for DEF CON 34. Fourteen channels are dark. Your job is to light them up.
Download before the con. The app locks until the convention opens. When the doors open at LVCC West Hall in Las Vegas on August 7, it unlocks and the game begins.

FOURTEEN CHANNELS. ONE FINAL TARGET.
Every channel is a different kind of puzzle. Some are cryptographic. Some are physical. Some require hardware your phone didn't know it would be using. No hints. No walkthrough. Figure it out.
The challenges span XOR ciphers, steganography, DTMF tone analysis, radio direction finding, Bluetooth beacon hunting, geolocation, reverse image search, physical navigation, NFC, speech recognition, and more. Your phone's full sensor suite is in play — camera, microphone, GPS, accelerometer, compass, Bluetooth, NFC.

PRIZES
The first three players to complete all fourteen channels and claim the final flag receive physical prizes: gold, silver, and copper coins. Finishers four through thirteen get pins. Your rank is permanent — logged to the live leaderboard the moment you scan the hand.

THE LEADERBOARD
A live in-app finishers board tracks every player who completes the game, ranked by completion time. Watch it fill up in real time.

THERE IS MORE
The app has secrets that have nothing to do with the flags. Some people will find them. Most won't.

REQUIREMENTS
iOS 17 or later. Game Center must be enabled — the app authenticates silently at launch. Several challenges require network access, Bluetooth, NFC, location services, camera, and microphone. Grant permissions as the game asks for them or miss the challenges that need them.

The app is locked until August 7, 2026 at 9:00 AM PT. Show up at DEF CON 34, LVCC West Hall, Las Vegas.

You can play anywhere, but final flag unlocking prizes is only available in-person.


## Version history (last 3 releases)

### 1.4 — 2026-07-24

Bug fixes.

### 1.3 — 2026-07-19

UI polish and readability improvements:

• Redesigned the interactive water background on the lock and boot screens with smoother, more fluid ripples
• Improved text legibility over the animated background — larger, higher-contrast labels so everything is easy to read
• Cleaner leaderboard with a quick-access button at the top of the challenge list
• Leaderboard now refreshes every time it's shown so standings are always current
• Various visual refinements and stability fixes

Good hunting, and see you at DEF CON 34.

### 1.1 — 2026-07-18

No release notes.

## More apps by Jeremy Yablan

- [Tracker Detector](https://appshunter.io/ios/app/tracker-detector/id6738701716)
- [Corefall: Pulse](https://appshunter.io/ios/app/corefall-pulse/id6780244706)
- [Vibemaster](https://appshunter.io/ios/app/vibemaster/id6782400214)
- [Poppy Tap!](https://appshunter.io/ios/app/poppy-tap/id6782660642)
- [WarBLE Go](https://appshunter.io/ios/app/warble-go/id6783390938)

All apps by Jeremy Yablan: https://appshunter.io/developer/1781747583

## Related topics

[jeremy yablan](https://appshunter.io/ios/topics/jeremy-yablan)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-05.*