| Date | User | Challenge | Score |
| MomneNessah | Vote for Pedro | 150 | |
| Farida | You either know, XOR you don't | 30 | |
| z1g24g | Keyed Permutations | 5 | |
| michaelS | Resisting Bruteforce | 10 | |
| alaouinadi | Point Addition | 30 | |
| z1g24g | Transparency | 50 | |
| NR07 | XOR Properties | 15 | |
| GingerCarrot | André Encoding | 80 | |
| MomneNessah | Blinding Light | 120 | |
| yr81 | Dancing Queen | 120 | |
| hubg0b71n | Bytes and Big Integers | 10 | |
| MomneNessah | Let's Decrypt | 80 | |
| Ebeneth | Bytes and Big Integers | 10 | |
| MomneNessah | Signing Server | 60 | |
| Kheeto | Modulus Inutilis | 50 | |
| z1g24g | SSH Keys | 35 | |
| MomneNessah | Euler's Totient | 20 | |
| michaelS | Keyed Permutations | 5 | |
| MomneNessah | Public Keys | 15 | |
| thunremmoni | Round Keys | 20 | |
| MomneNessah | Modular Exponentiation | 10 | |
| michaelS | Modular Binomials | 80 | |
| Kheeto | Salty | 20 | |
| MomneNessah | Network Attacks | 5 | |
| Kheeto | Manyprime | 40 | |
| prismo99 | XOR Starter | 10 | |
| cbr4l0k | Export-grade | 100 | |
| MomneNessah | Great Snakes | 3 | |
| Laith3 | Extended GCD | 20 | |
| vernonnestor | Hex | 5 | |
| K0b4lsky | Base64 | 10 | |
| Lschchou | Keyed Permutations | 5 | |
| MomneNessah | Finding Flags | 2 | |
| Kheeto | Monoprime | 30 | |
| prismo99 | Bytes and Big Integers | 10 | |
| g0ld3np4r3y | Modular Inverting | 25 | |
| artem25 | Base64 | 10 | |
| nizugu | Extended GCD | 20 | |
| nizugu | Greatest Common Divisor | 15 | |
| g0ld3np4r3y | Modular Arithmetic 2 | 20 | |
| favfrog07 | Great Snakes | 3 | |
| cmdlopez | Bytes and Big Integers | 10 | |
| K0b4lsky | Hex | 5 | |
| artem25 | Hex | 5 | |
| nizugu | You either know, XOR you don't | 30 | |
| nizugu | Favourite byte | 20 | |
| K0b4lsky | ASCII | 5 | |
| thunremmoni | Structure of AES | 15 | |
| nizugu | XOR Properties | 15 | |
| nizugu | XOR Starter | 10 |
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