| Date | User | Challenge | Score |
| arp1t0x | Static Client | 100 | |
| sgrenz | LWE Background | 5 | |
| redfly | Passwords as Keys | 50 | |
| Duckxx | You either know, XOR you don't | 30 | |
| dolphinned | Modes of Operation Starter | 15 | |
| knokl | Base64 | 10 | |
| redfly | Modes of Operation Starter | 15 | |
| nous | Paper Plane | 120 | |
| knokl | Hex | 5 | |
| nous | Bespoke Padding | 100 | |
| redfly | Bringing It All Together | 50 | |
| PAWOS | Point Negation | 10 | |
| redfly | Diffusion through Permutation | 30 | |
| knokl | ASCII | 5 | |
| senorpanda | Favourite byte | 20 | |
| knokl | Great Snakes | 3 | |
| roxy9855415684 | Hex | 5 | |
| jd3boots | Modular Arithmetic 2 | 20 | |
| roxy9855415684 | ASCII | 5 | |
| PAWOS | Background Reading | 5 | |
| roxy9855415684 | Great Snakes | 3 | |
| jd3boots | Modular Arithmetic 1 | 20 | |
| roxy9855415684 | Finding Flags | 2 | |
| knokl | Finding Flags | 2 | |
| jd3boots | Extended GCD | 20 | |
| senorpanda | XOR Properties | 15 | |
| Parlish | Great Snakes | 3 | |
| RotaJakiro | Legendre Symbol | 35 | |
| V1ckey | Background Reading | 5 | |
| skcryptohack | OR Proof | 75 | |
| V1ckey | Export-grade | 100 | |
| Salo | Great Snakes | 3 | |
| Salo | Finding Flags | 2 | |
| ClockSeller | Modular Arithmetic 2 | 20 | |
| jd3boots | Greatest Common Divisor | 15 | |
| RotaJakiro | Quadratic Residues | 25 | |
| jmusic | Monoprime | 30 | |
| medveed | XOR Starter | 10 | |
| medveed | XOR Properties | 15 | |
| medveed | Favourite byte | 20 | |
| Atria | Bytes and Big Integers | 10 | |
| redfly | Confusion through Substitution | 25 | |
| jd3boots | You either know, XOR you don't | 30 | |
| medveed | You either know, XOR you don't | 30 | |
| jd3boots | Favourite byte | 20 | |
| ClockSeller | Modular Arithmetic 1 | 20 | |
| jmusic | Factoring | 15 | |
| hanx | Finding Flags | 2 | |
| Guraja | Network Attacks | 5 | |
| kratta | Quadratic Residues | 25 |
You are now level Current level