Tech · Facts & stats · iChallenge network
Daily facts and stats about zero-knowledge proofs, plus real challenges to put them to work.
In 'ZK proof', what does ZK stand for?
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One ranked attempt per day. Practice as much as you like.
Join one, log your days or post your proof. Finishing earns XP and the Finisher badge.
Prove you found a hidden figure in a busy picture by covering the page with a large sheet that has a small hole, and post a write-up.
SponsorseCorp.comSavingTheWorld.orgVentureOS.com
Encode one short message a day with a Caesar cipher and have someone decode it. Check in daily.
SponsorseCorp.comSavingTheWorld.orgVentureOS.com
Explain the 'cave and magic door' zero-knowledge story to a friend or family member and post a short write-up of how it went.
SponsorseCorp.comSavingTheWorld.orgVentureOS.com
Live counts from ZKChallenge.com. All arena stats →
Earned on any arena, shown on your profile everywhere.
Add your email to keep your level, streak and badges if you switch devices, and carry them to every iChallenge arena. One email when you save; no spam.
Fund a prize on ZKChallenge.com and your brand sits on the challenge card, the leaderboard and every finisher's share. Prizes only appear once they're funded, so players can trust what they see.
No — knowledge games only. Nothing here is financial advice.
Only when a sponsor funds a prize. Funded prizes and their rules are shown on the challenge card; otherwise you play for rank and badges.
Everyone on this arena gets the same five questions each day, from easy to hard. You get one ranked attempt; practice rounds are unlimited.
100 points per correct answer, up to 50 more for answering quickly, a combo multiplier for answers in a row, and 150 bonus points for a perfect round.
Yes. Playing, streaks, badges and leaderboards are free. Some challenges carry a sponsor-funded prize; the challenge card shows it when one is funded.