| Date | User | Challenge | Score |
| garrett24 | Jack's Birthday Confusion | 30 | |
| gogxst | Base64 | 10 | |
| nczxl | ASCII | 5 | |
| qsta | Great Snakes | 3 | |
| galdu | Transparency | 50 | |
| galdu | SSH Keys | 35 | |
| gogxst | Hex | 5 | |
| UrLastWish | Modular Binomials | 80 | |
| maholyram | Base64 | 10 | |
| nczxl | Great Snakes | 3 | |
| PAWOS | Curves and Logs | 40 | |
| nczxl | Finding Flags | 2 | |
| maholyram | Hex | 5 | |
| garrett24 | Jack's Birthday Hash | 20 | |
| PAWOS | Scalar Multiplication | 35 | |
| d22 | Base64 | 10 | |
| mpg | Signing Server | 60 | |
| yuriykras | Favourite byte | 20 | |
| PatrickL_SC | Everything is Big | 70 | |
| yuriykras | XOR Properties | 15 | |
| PAWOS | Point Addition | 30 | |
| osan | Resisting Bruteforce | 10 | |
| osan | Keyed Permutations | 5 | |
| osan | Privacy-Enhanced Mail? | 25 | |
| 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 |
You are now level Current level