| Date | User | Challenge | Score |
| BijirBijir | Bytes and Big Integers | 10 | |
| DavidN | XOR Properties | 15 | |
| QRms | LWE Background | 5 | |
| BijirBijir | Base64 | 10 | |
| Vinjr | LWE Background | 5 | |
| vasilik1 | Great Snakes | 3 | |
| Kosta | Favourite byte | 20 | |
| vasilik1 | Finding Flags | 2 | |
| 25520221 | Resisting Bruteforce | 10 | |
| BijirBijir | Hex | 5 | |
| Asterix22 | Passwords as Keys | 50 | |
| khanhtai | Modular Binomials | 80 | |
| 25520221 | Keyed Permutations | 5 | |
| poorlajka | Working with Fields | 10 | |
| lcalvie | Backpack Cryptography | 120 | |
| QRms | Gaussian Reduction | 50 | |
| AmineHDN | Finding Flags | 2 | |
| SypherZ | Manyprime | 40 | |
| 25520221 | Lemur XOR | 40 | |
| rfmph | Confusion through Substitution | 25 | |
| Kosta | XOR Properties | 15 | |
| WhiteDeath16 | Bytes and Big Integers | 10 | |
| doquangluccqh | Modular Binomials | 80 | |
| khanhtai | Adrien's Signs | 80 | |
| Beci911 | XOR Starter | 10 | |
| matteocap0 | Round Keys | 20 | |
| 25520221 | Encoding Challenge | 40 | |
| Beci911 | Bytes and Big Integers | 10 | |
| jsaipafrer | Static Client | 100 | |
| Beci911 | Base64 | 10 | |
| Beci911 | Hex | 5 | |
| WhiteDeath16 | Base64 | 10 | |
| Beci911 | ASCII | 5 | |
| khanhtai | Privacy-Enhanced Mail? | 25 | |
| Beci911 | Great Snakes | 3 | |
| WhiteDeath16 | Hex | 5 | |
| Beci911 | Finding Flags | 2 | |
| WhiteDeath16 | ASCII | 5 | |
| doquangluccqh | Adrien's Signs | 80 | |
| khanhtai | Modular Inverting | 25 | |
| WhiteDeath16 | Great Snakes | 3 | |
| lusca | Modular Arithmetic 1 | 20 | |
| khanhtai | Modular Arithmetic 2 | 20 | |
| khanhtai | Modular Arithmetic 1 | 20 | |
| khanhtai | Extended GCD | 20 | |
| kagecrypt | Finding Flags | 2 | |
| doquangluccqh | Chinese Remainder Theorem | 40 | |
| Kosta | XOR Starter | 10 | |
| doquangluccqh | Modular Square Root | 35 | |
| khanhtai | Greatest Common Divisor | 15 |
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