| Date | User | Challenge | Score |
| grazkaa | Triple DES | 60 | |
| 0xftp | ASCII | 5 | |
| 0xftp | Great Snakes | 3 | |
| 0xftp | Finding Flags | 2 | |
| vas_fountas | Hex | 5 | |
| user467985982 | Background Reading | 5 | |
| pcspcs | Let's Decrypt | 80 | |
| vas_fountas | ASCII | 5 | |
| NonceSensei | Bean Counter | 60 | |
| NonceSensei | Symmetry | 50 | |
| vas_fountas | Great Snakes | 3 | |
| Zidnerpa | Jack's Birthday Hash | 20 | |
| user467985982 | Export-grade | 100 | |
| vas_fountas | Finding Flags | 2 | |
| G4ME0Ver | Transparency | 50 | |
| Vinjr | Bounded Noise | 50 | |
| NonceSensei | Bringing It All Together | 50 | |
| NonceSensei | Flipping Cookie | 60 | |
| G4ME0Ver | SSH Keys | 35 | |
| Cosmos2911 | Lemur XOR | 40 | |
| NonceSensei | ECB CBC WTF | 55 | |
| PanagiotaTr | You either know, XOR you don't | 30 | |
| Cosmos2911 | You either know, XOR you don't | 30 | |
| Nythrex01 | ASCII | 5 | |
| Nythrex01 | Great Snakes | 3 | |
| Cosmos2911 | Favourite byte | 20 | |
| NonceSensei | ECB Oracle | 60 | |
| Nythrex01 | Finding Flags | 2 | |
| micho | XOR Starter | 10 | |
| Love24ate | Finding Flags | 2 | |
| G4ME0Ver | Privacy-Enhanced Mail? | 25 | |
| michiel | Base64 | 10 | |
| Mai2162 | XOR Starter | 10 | |
| d0lmiodawg | ECB Oracle | 60 | |
| pin3apple07 | Background Reading | 5 | |
| michiel | Hex | 5 | |
| header | Infinite Descent | 50 | |
| grazkaa | Lazy CBC | 60 | |
| Waffle4450 | Finding Flags | 2 | |
| PanagiotaTr | Favourite byte | 20 | |
| grazkaa | Bean Counter | 60 | |
| NonceSensei | Passwords as Keys | 50 | |
| G4ME0Ver | Modular Arithmetic 1 | 20 | |
| G4ME0Ver | Extended GCD | 20 | |
| The_Hacklerrrrrr | Bytes and Big Integers | 10 | |
| PanagiotaTr | XOR Properties | 15 | |
| Gondowt | ECB Oracle | 60 | |
| michiel | ASCII | 5 | |
| G4ME0Ver | Greatest Common Divisor | 15 | |
| ThePirate42 | Moving Problems | 150 |
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