| Date | User | Challenge | Score |
| ydu | Greatest Common Divisor | 15 | |
| Ryanispop | Diffusion through Permutation | 30 | |
| NEEL_2006_MONDAL | No Leaks | 100 | |
| V1ckey | Private Keys | 20 | |
| Firehawk14 | Finding Flags | 2 | |
| Ryanispop | Confusion through Substitution | 25 | |
| hiswui | MD0 | 80 | |
| Ryanispop | Round Keys | 20 | |
| Ryanispop | Structure of AES | 15 | |
| jrhamburger | Great Snakes | 3 | |
| Ryanispop | Resisting Bruteforce | 10 | |
| Ryanispop | Keyed Permutations | 5 | |
| jrhamburger | Finding Flags | 2 | |
| illuvision | Generators of Groups | 20 | |
| Tulgaa | Megalomaniac 1 | 100 | |
| Ryanispop | Transparency | 50 | |
| vic1208 | Modular Arithmetic 2 | 20 | |
| gchiu02 | Base64 | 10 | |
| illuvision | Working with Fields | 10 | |
| Ryanispop | SSH Keys | 35 | |
| Ryanispop | CERTainly not | 30 | |
| Ryanispop | Privacy-Enhanced Mail? | 25 | |
| Ryanispop | Modular Inverting | 25 | |
| gchiu02 | Hex | 5 | |
| LUCFER | Base64 | 10 | |
| Ryanispop | Modular Arithmetic 2 | 20 | |
| LUCFER | Hex | 5 | |
| LUCFER | ASCII | 5 | |
| anibal | Bytes and Big Integers | 10 | |
| LUCFER | Great Snakes | 3 | |
| Aloutrance | Curves and Logs | 40 | |
| LUCFER | Finding Flags | 2 | |
| Ryanispop | Modular Arithmetic 1 | 20 | |
| AESpider | Lo-Hi Card Game | 120 | |
| Ryanispop | Extended GCD | 20 | |
| gchiu02 | ASCII | 5 | |
| cortex12345 | Flipping Cookie | 60 | |
| gchiu02 | Great Snakes | 3 | |
| Ryanispop | Greatest Common Divisor | 15 | |
| gchiu02 | Finding Flags | 2 | |
| hasuke | Montgomery's Ladder | 40 | |
| youssef_reda | Resisting Bruteforce | 10 | |
| Aloutrance | Point Addition | 30 | |
| youssef_reda | Keyed Permutations | 5 | |
| Dag0n | Greatest Common Divisor | 15 | |
| Ryanispop | Lemur XOR | 40 | |
| Ryanispop | You either know, XOR you don't | 30 | |
| Ryanispop | Favourite byte | 20 | |
| Ryanispop | XOR Properties | 15 | |
| Aloutrance | Scalar Multiplication | 35 |
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