| Date | User | Challenge | Score |
| PittaPork | Legendre Symbol | 35 | |
| Calug | Passwords as Keys | 50 | |
| kerik | Base64 | 10 | |
| Avinashh | Lemur XOR | 40 | |
| akshatdagoat | You either know, XOR you don't | 30 | |
| kerik | Hex | 5 | |
| kerik | ASCII | 5 | |
| MrRaven | XOR Properties | 15 | |
| kerik | Network Attacks | 5 | |
| Avinashh | You either know, XOR you don't | 30 | |
| kerik | Great Snakes | 3 | |
| kerik | Finding Flags | 2 | |
| Oshiks | Token Appreciation | 5 | |
| akshatdagoat | Favourite byte | 20 | |
| kerik | RSA Decryption | 20 | |
| kerik | Private Keys | 20 | |
| kerik | Euler's Totient | 20 | |
| kerik | Public Keys | 15 | |
| Mathicc | Base64 | 10 | |
| kerik | Modular Exponentiation | 10 | |
| Avinashh | Encoding Challenge | 40 | |
| Mathicc | Hex | 5 | |
| vox_off | XOR Properties | 15 | |
| QWXXHSX123 | Keyed Permutations | 5 | |
| AstroHammy | Diffusion through Permutation | 30 | |
| Kacebover | Crossed Wires | 100 | |
| toniokan | Favourite byte | 20 | |
| Jacopo_Pio | Favourite byte | 20 | |
| Avinashh | Network Attacks | 5 | |
| toniokan | XOR Properties | 15 | |
| CryptoBro | ECB CBC WTF | 55 | |
| shewitt2 | Favourite byte | 20 | |
| Calug | Bringing It All Together | 50 | |
| Oshiks | Resisting Bruteforce | 10 | |
| Woodsman | Chinese Remainder Theorem | 40 | |
| Kacebover | Everything is Big | 70 | |
| TajCi | Hex | 5 | |
| jmusic | Quadratic Residues | 25 | |
| fjukh7872 | Static Client | 100 | |
| TajCi | ASCII | 5 | |
| Aethelis | XOR Starter | 10 | |
| shewitt2 | XOR Properties | 15 | |
| polarnono | Lemur XOR | 40 | |
| vox_off | XOR Starter | 10 | |
| TajCi | Great Snakes | 3 | |
| julian_kowa | Extended GCD | 20 | |
| fjukh7872 | Additive | 70 | |
| BlubBlubBlub | Diffusion through Permutation | 30 | |
| Calug | Modes of Operation Starter | 15 | |
| Scofield | XOR Properties | 15 |
You are now level Current level