| Date | User | Challenge | Score |
| dlesk | Mister Saplin's Preview | 80 | |
| rida | ECB Oracle | 60 | |
| rnadkm | Modular Arithmetic 1 | 20 | |
| tolliob | Modular Square Root | 35 | |
| hamdy_alaa | Bytes and Big Integers | 10 | |
| hamdy_alaa | Base64 | 10 | |
| ThePirate42 | Symmetry | 50 | |
| plushie | Structure of AES | 15 | |
| hamdy_alaa | Hex | 5 | |
| AlphaAnto10 | Great Snakes | 3 | |
| ThePirate42 | Triple DES | 60 | |
| xavier1 | XOR Starter | 10 | |
| AlphaAnto10 | Finding Flags | 2 | |
| DaRealRob | Favourite byte | 20 | |
| hamdy_alaa | ASCII | 5 | |
| xavier1 | Bytes and Big Integers | 10 | |
| xavier1 | Base64 | 10 | |
| hamdy_alaa | Great Snakes | 3 | |
| xavier1 | Hex | 5 | |
| fjukh7872 | Dancing Queen | 120 | |
| hamdy_alaa | Finding Flags | 2 | |
| xavier1 | ASCII | 5 | |
| xavier1 | Great Snakes | 3 | |
| xavier1 | Finding Flags | 2 | |
| tolliob | Legendre Symbol | 35 | |
| AbhiD | Bytes and Big Integers | 10 | |
| DaRealRob | XOR Properties | 15 | |
| jablonskim | Modular Arithmetic 1 | 20 | |
| nous | Beatboxer | 150 | |
| nous | The j-invariant | 20 | |
| nous | Introduction to Isogenies | 10 | |
| plushie | Resisting Bruteforce | 10 | |
| plushie | Keyed Permutations | 5 | |
| jablonskim | Extended GCD | 20 | |
| XR3Y | Moving Problems | 150 | |
| tolliob | Quadratic Residues | 25 | |
| ThePirate42 | Lazy CBC | 60 | |
| jablonskim | Greatest Common Divisor | 15 | |
| StateMachine | XOR Properties | 15 | |
| tolliob | Modular Inverting | 25 | |
| tolliob | Modular Arithmetic 2 | 20 | |
| fjukh7872 | Stream of Consciousness | 80 | |
| Cinder | Great Snakes | 3 | |
| StateMachine | XOR Starter | 10 | |
| zeksy21 | Quadratic Residues | 25 | |
| Cinder | Finding Flags | 2 | |
| StateMachine | Bytes and Big Integers | 10 | |
| tolliob | Modular Arithmetic 1 | 20 | |
| tolliob | Extended GCD | 20 | |
| gn0m3 | Working with Fields | 10 |
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