| Date | User | Challenge | Score |
| mohamed_tadili | Modular Exponentiation | 10 | |
| Camneme | Hex | 5 | |
| shachar125 | Modes of Operation Starter | 15 | |
| VictorTrend1 | Endless Emails | 150 | |
| Camneme | ASCII | 5 | |
| sherlocky7y | Confusion through Substitution | 25 | |
| B77 | Base64 | 10 | |
| Asil | Hex | 5 | |
| miiyen | Crossed Wires | 100 | |
| bbrth41 | Quadratic Residues | 25 | |
| 5H4RKK | Exceptional Curves | 100 | |
| jaehyeon | ECB Oracle | 60 | |
| 5H4RKK | Micro Transmissions | 120 | |
| VictorTrend1 | Everything is Still Big | 100 | |
| Kotoha | Dancing Queen | 120 | |
| gsry | ASCII | 5 | |
| B77 | Hex | 5 | |
| NahyeKim | Bean Counter | 60 | |
| shachar125 | Bringing It All Together | 50 | |
| seung3096 | ECB CBC WTF | 55 | |
| Sc4rl3t | Deriving Symmetric Keys | 40 | |
| B77 | ASCII | 5 | |
| HarabagiuRobert | Everything is Still Big | 100 | |
| B77 | Great Snakes | 3 | |
| NahyeKim | Symmetry | 50 | |
| seung3096 | ECB Oracle | 60 | |
| NahyeKim | Flipping Cookie | 60 | |
| B77 | Finding Flags | 2 | |
| origabai | Script Kiddie | 70 | |
| Junsung | Passwords as Keys | 50 | |
| hULIGAN32 | XOR Starter | 10 | |
| hULIGAN32 | Bytes and Big Integers | 10 | |
| zczjyq | Everything is Big | 70 | |
| MinhBoss | Script Kiddie | 70 | |
| origabai | Static Client 2 | 120 | |
| Merci_b | Modular Arithmetic 1 | 20 | |
| Junsung | Modes of Operation Starter | 15 | |
| Kotoha | Bean Counter | 60 | |
| bbrth41 | Modular Inverting | 25 | |
| Camneme | Great Snakes | 3 | |
| bbrth41 | Modular Arithmetic 2 | 20 | |
| ENRIC46 | Favourite byte | 20 | |
| Junsung | Bringing It All Together | 50 | |
| hULIGAN32 | Base64 | 10 | |
| Junsung | Diffusion through Permutation | 30 | |
| zetelen | No Way JOSE | 20 | |
| vesaloko | ASCII | 5 | |
| Junsung | Confusion through Substitution | 25 | |
| Junsung | Round Keys | 20 | |
| Camneme | Finding Flags | 2 |
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