| Date | User | Challenge | Score |
| JellyGames | Modulus Inutilis | 50 | |
| oiu890 | Working with Fields | 10 | |
| neilbutcher | Lemur XOR | 40 | |
| 11undefined11 | XOR Starter | 10 | |
| porolishinan | Successive Powers | 60 | |
| stawitcc | Modular Inverting | 25 | |
| Idris_Altunay | Hex | 5 | |
| cadenv | You either know, XOR you don't | 30 | |
| ramingoes | Bytes and Big Integers | 10 | |
| hata | Bytes and Big Integers | 10 | |
| hata | Base64 | 10 | |
| JellyGames | Salty | 20 | |
| Mats_A | Structure of AES | 15 | |
| hata | Hex | 5 | |
| hata | ASCII | 5 | |
| JellyGames | Manyprime | 40 | |
| hata | Network Attacks | 5 | |
| stawitcc | Modular Arithmetic 2 | 20 | |
| as11 | You either know, XOR you don't | 30 | |
| hata | Great Snakes | 3 | |
| hata | Finding Flags | 2 | |
| 11undefined11 | Bytes and Big Integers | 10 | |
| lcalvie | Greatest Common Divisor | 15 | |
| fr1x3r | Diffusion through Permutation | 30 | |
| oiu890 | Modulus Inutilis | 50 | |
| stawitcc | Modular Arithmetic 1 | 20 | |
| JellyGames | Monoprime | 30 | |
| stawitcc | Extended GCD | 20 | |
| Idris_Altunay | ASCII | 5 | |
| porolishinan | Chinese Remainder Theorem | 40 | |
| JellyGames | Factoring | 15 | |
| Idris_Altunay | Great Snakes | 3 | |
| 11undefined11 | Base64 | 10 | |
| cadenv | Favourite byte | 20 | |
| Inkius | Secure Protocols | 5 | |
| neilbutcher | You either know, XOR you don't | 30 | |
| ramingoes | Base64 | 10 | |
| jakoby666 | Great Snakes | 3 | |
| 11undefined11 | Hex | 5 | |
| Idris_Altunay | Finding Flags | 2 | |
| jakoby666 | Finding Flags | 2 | |
| 11undefined11 | ASCII | 5 | |
| oiu890 | Salty | 20 | |
| rxxxn | Adrien's Signs | 80 | |
| sudor269 | Static Client | 100 | |
| neilbutcher | Favourite byte | 20 | |
| Balm | XOR Starter | 10 | |
| mahu | ECB Oracle | 60 | |
| rxxxn | Chinese Remainder Theorem | 40 | |
| ramingoes | Hex | 5 |
You are now level Current level