| Date | User | Challenge | Score |
| xx33xx | Resisting Bruteforce | 10 | |
| norma1person | Micro Transmissions | 120 | |
| PIEMMM | Modular Arithmetic 2 | 20 | |
| PIEMMM | Modular Arithmetic 1 | 20 | |
| xx33xx | Keyed Permutations | 5 | |
| PIEMMM | Extended GCD | 20 | |
| red_mito | Round Keys | 20 | |
| PIEMMM | Greatest Common Divisor | 15 | |
| junho | Point Negation | 10 | |
| red_mito | Structure of AES | 15 | |
| iliawedz | Hex | 5 | |
| RawanCys | Base64 | 10 | |
| iliawedz | ASCII | 5 | |
| RawanCys | Hex | 5 | |
| RawanCys | ASCII | 5 | |
| KMA_SiriuS_ | ProSign 3 | 100 | |
| nesho | Great Snakes | 3 | |
| Haikall | Lemur XOR | 40 | |
| Eozh | Base64 | 10 | |
| Eozh | Hex | 5 | |
| Eozh | ASCII | 5 | |
| Eozh | Great Snakes | 3 | |
| SGT0v0 | Greatest Common Divisor | 15 | |
| nesho | Finding Flags | 2 | |
| Eozh | Finding Flags | 2 | |
| HighestClimber | RSA Decryption | 20 | |
| toenandarlin | Bytes and Big Integers | 10 | |
| SGT0v0 | You either know, XOR you don't | 30 | |
| iliawedz | Great Snakes | 3 | |
| SGT0v0 | Favourite byte | 20 | |
| YWzhong | Moving Problems | 150 | |
| iliawedz | Finding Flags | 2 | |
| Nihal_21 | XOR Starter | 10 | |
| ROPShade | Greatest Common Divisor | 15 | |
| YCHuang | Fast Primes | 75 | |
| wangcongcong | XOR Starter | 10 | |
| Hanging_Tree | Background Reading | 5 | |
| YCHuang | Marin's Secrets | 50 | |
| Bang_Jo | Bytes and Big Integers | 10 | |
| zhubat | RSA Decryption | 20 | |
| YCHuang | Infinite Descent | 50 | |
| Hiiii | XOR Properties | 15 | |
| kai2006 | Find the Lattice | 100 | |
| YCHuang | Endless Emails | 150 | |
| zhubat | Private Keys | 20 | |
| wangcongcong | Bytes and Big Integers | 10 | |
| ox1bx | Forbidden Fruit | 150 | |
| GHL | Noise Free | 40 | |
| wangcongcong | Base64 | 10 | |
| wangcongcong | Hex | 5 |
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