| Date | User | Challenge | Score |
| l3v | Modular Arithmetic 1 | 20 | |
| nmcrypto | Point Negation | 10 | |
| 0Drakos | Chinese Remainder Theorem | 40 | |
| noopnoop | Proofs of Knowledge | 20 | |
| 0Drakos | Modular Square Root | 35 | |
| z30r0x | Favourite byte | 20 | |
| 0Drakos | Legendre Symbol | 35 | |
| VThisZomzom | Modular Binomials | 80 | |
| kiennvbak | Favourite byte | 20 | |
| Marwa_Ayman | Greatest Common Divisor | 15 | |
| Galois | Successive Powers | 60 | |
| 0Drakos | Quadratic Residues | 25 | |
| Iskan | Hex | 5 | |
| noopnoop | ZKP Introduction | 5 | |
| 0Drakos | Modular Inverting | 25 | |
| kiennvbak | XOR Properties | 15 | |
| Galois | ECB CBC WTF | 55 | |
| 0Drakos | Modular Arithmetic 2 | 20 | |
| 0Drakos | Modular Arithmetic 1 | 20 | |
| Galois | Transparency | 50 | |
| z30r0x | XOR Properties | 15 | |
| darththucydides | OR Proof | 75 | |
| darththucydides | OR Proof (CryptoHack) | 0 | |
| LangerSword | Passwords as Keys | 50 | |
| 0Drakos | Extended GCD | 20 | |
| 0Drakos | Greatest Common Divisor | 15 | |
| Galois | SSH Keys | 35 | |
| Iskan | ASCII | 5 | |
| Galois | Privacy-Enhanced Mail? | 25 | |
| Galois | CERTainly not | 30 | |
| kiennvbak | XOR Starter | 10 | |
| LangerSword | Modes of Operation Starter | 15 | |
| Galois | Lemur XOR | 40 | |
| Iskan | Great Snakes | 3 | |
| Galois | Encoding Challenge | 40 | |
| Iskan | Finding Flags | 2 | |
| 0xSponge | Great Snakes | 3 | |
| 0xSponge | Finding Flags | 2 | |
| LangerSword | Bringing It All Together | 50 | |
| kiennvbak | Bytes and Big Integers | 10 | |
| Galois | Network Attacks | 5 | |
| Galois | ECB Oracle | 60 | |
| kiennvbak | Base64 | 10 | |
| kiennvbak | Hex | 5 | |
| amitbashan | Parameter Injection | 60 | |
| kiennvbak | ASCII | 5 | |
| udh | Public Keys | 15 | |
| udh | Modular Exponentiation | 10 | |
| Galois | Passwords as Keys | 50 | |
| kiennvbak | Great Snakes | 3 |
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