Proof+250 XP
Turn On Two-Factor
Enable two-factor authentication on one of your own accounts. Post a short write-up of what you secured, never your codes.
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Tech · Facts & stats · iChallenge network
The Hacker Challenge
Daily facts and stats about ethical hacking and cybersecurity basics, plus real challenges to put them to work.
Today's 3 challenges
In hacking competitions, what does CTF stand for?
You went
Level1Rookie
XPPlay a round to earn XP
Streak0days
LeagueBronzeweekly
Daily #42Resets at midnight UTC
Today's round
- 5 questions
- 20s each
- 0 played today
One ranked attempt per day. Practice as much as you like.
Challenges
Join one, log your days or post your proof. Finishing earns XP and the Finisher badge.
Streak · 7 days+185 XP
7-Day Password Cleanup
Each day, replace one weak or reused password on your own accounts with a strong unique one. Check in once a day.
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Proof+250 XP
Solve a Beginner CTF Puzzle
Complete one free beginner puzzle on a legal, practice-only capture-the-flag site. Post a short write-up of how you solved it.
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Streak · 7 days+185 XP
Spot the Phish Streak
Each day, check one email in your own inbox for phishing warning signs and note what you looked for. Check in once a day.
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By the numbers
Live counts from ChallengeHacker.com. All arena stats →
Facts in the pack12
Visitors, 30 days42
Leaderboard
- Loading…
Badges
Earned on any arena, shown on your profile everywhere.
First RoundFinish your first daily round.
FlawlessAnswer every question in a round correctly.
LightningA perfect round in under 25 seconds.
On a RollPlay 3 days in a row.
Week WarriorPlay 7 days in a row.
UnbreakablePlay 30 days in a row.
ExplorerPlay daily rounds in 5 different arenas.
GlobetrotterPlay daily rounds in 25 different arenas.
PolymathPlay daily rounds in 5 different topics.
In the ArenaJoin your first challenge.
FinisherComplete a challenge.
RecruiterInvite a friend who finishes a round.
CaptainInvite 5 friends who finish a round.
PodiumFinish a day in an arena's top 3.
ChallengerReach level 10.
Profile SavedSave your progress with an email.
Save your progress
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.
Put a prize on a challenge
Fund a prize on ChallengeHacker.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.
- Pick the challenge and the prize
- We review entries before a funded prize is awarded
- You get finisher and engagement numbers after it closes
Current sponsors
Questions
What languages count?
Any language. Challenges score consistency and completion, not syntax.
Is this for beginners?
Yes — quiz rounds start easy and scale with your streak.
How does the daily round work?
Everyone on this arena gets the same five questions each day, from easy to hard. You get one ranked attempt; practice rounds are unlimited.
How is my score calculated?
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.
Is it free?
Yes. Playing, streaks, badges and leaderboards are free. Some challenges carry a sponsor-funded prize; the challenge card shows it when one is funded.