| Date | User | Challenge | Score |
| Nobody322 | Base64 | 10 | |
| asdasdasdasd | JWT Sessions | 10 | |
| asdasdasdasd | Token Appreciation | 5 | |
| CrankyPants | Export-grade | 100 | |
| nervantus | Resisting Bruteforce | 10 | |
| Freitagen | Greatest Common Divisor | 15 | |
| nervantus | Keyed Permutations | 5 | |
| Raspberry | Favourite byte | 20 | |
| Nobody322 | Hex | 5 | |
| kamlllzx | Favourite byte | 20 | |
| Raspberry | XOR Properties | 15 | |
| Nobody322 | ASCII | 5 | |
| Raspberry | XOR Starter | 10 | |
| gitblip | Finding Flags | 2 | |
| alexcy | Montgomery's Ladder | 40 | |
| Nobody322 | Great Snakes | 3 | |
| Raspberry | Encoding Challenge | 40 | |
| AlxGonin | Bean Counter | 60 | |
| Nobody322 | Finding Flags | 2 | |
| m4rked | Diffusion through Permutation | 30 | |
| timi1ch | Modular Inverting | 25 | |
| johnny3123 | Hex | 5 | |
| timi1ch | Modular Arithmetic 2 | 20 | |
| timi1ch | Modular Arithmetic 1 | 20 | |
| johnny3123 | ASCII | 5 | |
| hedge_hedgehog | Point Addition | 30 | |
| AlxGonin | Symmetry | 50 | |
| johnny3123 | Great Snakes | 3 | |
| johnny3123 | Finding Flags | 2 | |
| amdi | Greatest Common Divisor | 15 | |
| abdouzid | XOR Properties | 15 | |
| 0xFFFFFF | Lazy CBC | 60 | |
| abdouzid | XOR Starter | 10 | |
| corv1 | Great Snakes | 3 | |
| timi1ch | Extended GCD | 20 | |
| kamlllzx | XOR Properties | 15 | |
| abdouzid | Bytes and Big Integers | 10 | |
| Raspberry | Bytes and Big Integers | 10 | |
| mikuleci | Find the Lattice | 100 | |
| corv1 | Finding Flags | 2 | |
| mikuleci | Calm Down (HKCERT CTF) | 0 | |
| mikuleci | Sign in Please (HKCERT CTF) | 0 | |
| Raspberry | Base64 | 10 | |
| Raspberry | Hex | 5 | |
| Dakota_X3 | ASCII | 5 | |
| timi1ch | Greatest Common Divisor | 15 | |
| abdouzid | Base64 | 10 | |
| Raspberry | ASCII | 5 | |
| M93 | Adrien's Signs | 80 | |
| Deepika24 | ECB CBC WTF | 55 |
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