| Date | User | Challenge | Score |
| pmk1d | Diffusion through Permutation | 30 | |
| Biscotte | RSA Decryption | 20 | |
| brute_froce | Bytes and Big Integers | 10 | |
| Biscotte | Private Keys | 20 | |
| Aqua0x0 | Endless Emails | 150 | |
| kjs36202 | Greatest Common Divisor | 15 | |
| Hotaro | Great Snakes | 3 | |
| crypto_knight | Finding Flags | 2 | |
| Hotaro | Finding Flags | 2 | |
| Habiba_Mahmoud | Great Snakes | 3 | |
| tertxv | Network Attacks | 5 | |
| Habiba_Mahmoud | Finding Flags | 2 | |
| Vseseva | XOR Properties | 15 | |
| kjs36202 | Lemur XOR | 40 | |
| akabeco | Modular Arithmetic 1 | 20 | |
| B00177175_Andre | Null or Never | 100 | |
| tertxv | Great Snakes | 3 | |
| akabeco | Extended GCD | 20 | |
| tertxv | Finding Flags | 2 | |
| Vseseva | XOR Starter | 10 | |
| lolitaall | Round Keys | 20 | |
| zeronine | Finding Flags | 2 | |
| brute_froce | Base64 | 10 | |
| BROMIN | Public Keys | 15 | |
| eternalstrike | Successive Powers | 60 | |
| Carixo | Null or Never | 100 | |
| BROMIN | Modular Exponentiation | 10 | |
| nhnamp | RSA Signatures | 25 | |
| FdLSifu | The Good, The Pad, The Ugly | 100 | |
| Hexium | Greatest Common Divisor | 15 | |
| ciphermalware | LFSR Destroyer | 250 | |
| eternalstrike | Modular Binomials | 80 | |
| Vseseva | Bytes and Big Integers | 10 | |
| Vseseva | Base64 | 10 | |
| medb | Merkle Trees | 25 | |
| magx27 | Base64 | 10 | |
| Aster_666 | Modular Binomials | 80 | |
| Vseseva | Hex | 5 | |
| S4MTEL | Modular Arithmetic 2 | 20 | |
| Vseseva | ASCII | 5 | |
| brute_froce | Hex | 5 | |
| Vseseva | Great Snakes | 3 | |
| magx27 | Hex | 5 | |
| Vseseva | Finding Flags | 2 | |
| Aster_666 | Adrien's Signs | 80 | |
| fynooc | ECB Oracle | 60 | |
| FdLSifu | Pad Thai | 80 | |
| magx27 | ASCII | 5 | |
| FustyFest | Keyed Permutations | 5 | |
| ciphermalware | Jeff's LFSR | 150 |
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