| Date | User | Challenge | Score |
| 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 | |
| cortex12345 | ECB CBC WTF | 55 | |
| Tulgaa | RSA or HMAC? Part 2 | 100 | |
| inv | Checkpoint | 150 | |
| Sparrow09 | ECB Oracle | 60 | |
| Tulgaa | Authenticated Handshake | 40 | |
| Aloutrance | Point Negation | 10 | |
| kakar07 | Salty | 20 | |
| EvelynMaria | Diffusion through Permutation | 30 | |
| EvelynMaria | Confusion through Substitution | 25 | |
| EvelynMaria | Round Keys | 20 | |
| EvelynMaria | Structure of AES | 15 | |
| kakar07 | Manyprime | 40 | |
| EvelynMaria | Resisting Bruteforce | 10 | |
| rattmanthestupid | Greatest Common Divisor | 15 | |
| EvelynMaria | Keyed Permutations | 5 | |
| hiswui | No Difference | 175 | |
| totohub | XOR Properties | 15 | |
| rattmanthestupid | Lemur XOR | 40 | |
| 0xSonic | Encoding Challenge | 40 | |
| g4brieel | You either know, XOR you don't | 30 | |
| rattmanthestupid | You either know, XOR you don't | 30 | |
| PAWOS | Crossed Wires | 100 | |
| youssef_reda | Adrien's Signs | 80 | |
| rattmanthestupid | Favourite byte | 20 | |
| g4brieel | Favourite byte | 20 |
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