Cryptography Challenges
Test your cryptographic skills with puzzles and challenges
Beginner
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Caesar's Secret Message
Decrypt this message that was encrypted using Caesar cipher: KHOOR ZRUOG
🏆 47 solved
Beginner
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Base64 Mystery
What does this Base64 encoded message say? SGVsbG8gQ3J5cHRv
🏆 132 solved
Intermediate
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Vigenère Challenge
Decrypt this Vigenère cipher. The key is a 4-letter word related to cryptography.
ZLMGS BPMQZ XPTMF JLMAX
🏆 23 solved
Intermediate
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Hash Collision Hunt
Find two different inputs that produce the same MD5 hash (first 4 characters).
🏆 8 solved
Advanced
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RSA Factorization
Factor this RSA modulus: N = 143. Find p and q such that N = p × q.
🏆 3 solved
Advanced
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AES Side Channel
Exploit timing differences to recover the AES key from this simulated implementation.
🏆 1 solved
🏆 Leaderboard
| Rank | User | Challenges Solved | Points | Badge |
|---|---|---|---|---|
| 1 | CryptoMaster | 47 | 2,350 | 🥇 Grandmaster |
| 2 | HashHunter | 42 | 2,100 | 🥈 Expert |
| 3 | CipherSage | 38 | 1,900 | 🥉 Advanced |
| 4 | You | 12 | 580 | 🔰 Novice |
| 5 | BlockChainBoy | 8 | 320 | 🌱 Beginner |