| Date | User | Challenge | Score |
| z1g24g | Diffusion through Permutation | 30 | |
| alaouinadi | Moving Problems | 150 | |
| hubg0b71n | You either know, XOR you don't | 30 | |
| blue_noob98 | ASCII | 5 | |
| blue_noob98 | Great Snakes | 3 | |
| blue_noob98 | Finding Flags | 2 | |
| g0ld3np4r3y | Quadratic Residues | 25 | |
| jablonskim | Square Eyes | 35 | |
| claudevicuna | What's a Lattice? | 40 | |
| Luciol | Finding Flags | 2 | |
| Dimbls | Authenticated Handshake | 40 | |
| K0b4lsky | You either know, XOR you don't | 30 | |
| hubg0b71n | Favourite byte | 20 | |
| michaelS | Bean Counter | 60 | |
| redpath64 | Adrien's Signs | 80 | |
| Oxidayzz | Network Attacks | 5 | |
| hubg0b71n | XOR Properties | 15 | |
| jablonskim | Inferius Prime | 30 | |
| michaelS | Symmetry | 50 | |
| michaelS | Flipping Cookie | 60 | |
| michaelS | ECB CBC WTF | 55 | |
| michaelS | ECB Oracle | 60 | |
| alaouinadi | ProSign 3 | 100 | |
| GingerCarrot | Dual Masters | 90 | |
| yuris72 | Modular Inverting | 25 | |
| z1g24g | Confusion through Substitution | 25 | |
| mishustick | Modular Binomials | 80 | |
| alaouinadi | Curveball | 100 | |
| sveta_shumovai | Forbidden Fruit | 150 | |
| Ebeneth | XOR Starter | 10 | |
| Ebeneth | Encoding Challenge | 40 | |
| michaelS | Passwords as Keys | 50 | |
| LiMeKoYo | XOR Properties | 15 | |
| K0b4lsky | Favourite byte | 20 | |
| alaouinadi | Smooth Criminal | 60 | |
| lolaolu | Bytes and Big Integers | 10 | |
| mishustick | Adrien's Signs | 80 | |
| michaelS | Modes of Operation Starter | 15 | |
| K0b4lsky | XOR Properties | 15 | |
| cmdlopez | Chinese Remainder Theorem | 40 | |
| cmdlopez | Modular Square Root | 35 | |
| michaelS | Bringing It All Together | 50 | |
| cmdlopez | Legendre Symbol | 35 | |
| cmdlopez | Quadratic Residues | 25 | |
| GingerCarrot | Abelian SIDH | 90 | |
| mishustick | Chinese Remainder Theorem | 40 | |
| cmdlopez | Modular Inverting | 25 | |
| cmdlopez | Modular Arithmetic 2 | 20 | |
| cmdlopez | Modular Arithmetic 1 | 20 | |
| cmdlopez | Extended GCD | 20 |
You are now level Current level