Feb 06, 2024

ScaleBit zkCTF 2024 Recap


ScaleBit’s first zkCTF, from February 3rd to 5th, was a huge success. It attracted 275 participants who solved puzzles using technologies such as halo2, Circom, Solidity, and STARKs.

The event attracted members from top organizations such as Sec3, Open Zeppelin, Amber Group, DeFiHackLabs, etc. It also drew participation from famous white-hat hackers, including Zhuo Zhang.

Celebrating Our Winners

The top 10 winners of SaleBit’s first ZK CTF Competition are:



  1. Super Rookies
  2. cbd1913
  3. CS1R
  4. xyZKnoob
  5. Duckki
  6. 水瓶
  7. keep
  8. erhant
  9. latt1ce
  10. 很霸气对部队


Statistics and write-ups

Everyone can explore the challenges here:

Here are some insightful write-ups from the winners for your reference:

And a big thank you to our collaborators who helped organize and sponsor the event, including:

  • Scroll
  • Term Structure
  • Zomma Protocol
  • EthStorage
  • Secbit
  • zkMove

For a complete list of our partners, please visit

Here are more interesting statistics of the ScaleBit zkCTF 2024:

  • 9 challenges in total
  • 215 teams with a total of 275 participants
  • 129 right submissions
  • 51 wrong submissions
  • $3,500 in prizes


Based on the submitted flags, here’s a breakdown of the challenges by the percentage of teams that submitted correct answers:


  • Checkin - 100%
  • Roundabout - 31.48%
  • Kid’s Math - 25.93%
  • Int Division - 24.07%
  • Familiar Strangers - 20.37%
  • Is Zero - 12.96%
  • Mixer - 11.11%
  • Ethereal Quest - 9.26%
  • What a Waste - 3.70%

We want to hear you!

Feedback about the competition is welcome and encouraged. What did we do right, and how we can improve?

Thank you all for participating! ScaleBit will host more CTF events, so stay tuned for more updates and details. Keep in touch with us:


About ScaleBit

ScaleBit, a subsidiary brand of BitsLab, is a blockchain security team that provides security solutions for Mass Adoption of Web3. With expertise in scaling technologies like blockchain interoperability and zero-knowledge proofs, we provide meticulous and cutting-edge security audits for blockchain applications. The team comprises security professionals with extensive experience in both academia and enterprise. Our mission is to provide security solutions for Web3 Mass Adoption and make security accessible for all.

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