| Date | User | Challenge | Score |
| rfmph | Lemur XOR | 40 | |
| LACiA | Couples | 100 | |
| 1595844086 | Modular Arithmetic 1 | 20 | |
| DropletU | Finding Flags | 2 | |
| 1595844086 | Extended GCD | 20 | |
| rfmph | Encoding Challenge | 40 | |
| HectorTheGreat | Base64 | 10 | |
| Holfelder | Square Eyes | 35 | |
| 1595844086 | Greatest Common Divisor | 15 | |
| HectorTheGreat | Hex | 5 | |
| NoBirdWasHam | Twisted CSIDH Isogenies | 70 | |
| rfmph | Network Attacks | 5 | |
| rfmph | Moving Problems | 150 | |
| entheo97 | Euler's Totient | 20 | |
| Aybseravat03 | Finding Flags | 2 | |
| letienthanh | Base64 | 10 | |
| D3FAULTH | Network Attacks | 5 | |
| D3FAULTH | Great Snakes | 3 | |
| alexcy | ECB CBC WTF | 55 | |
| superguy576 | ECB CBC WTF | 55 | |
| alm | Crossed Wires | 100 | |
| alm | Everything is Big | 70 | |
| alexcy | ECB Oracle | 60 | |
| alm | Square Eyes | 35 | |
| superguy576 | Passwords as Keys | 50 | |
| nzo | Modular Inverting | 25 | |
| presz0xD2 | Favourite byte | 20 | |
| presz0xD2 | XOR Properties | 15 | |
| nzo | You either know, XOR you don't | 30 | |
| superguy576 | Modes of Operation Starter | 15 | |
| entheo97 | Public Keys | 15 | |
| jagotu | Rhetorical Oracle 2 | 150 | |
| SolariaNights | You either know, XOR you don't | 30 | |
| SolariaNights | Favourite byte | 20 | |
| junodelacruz | ECB CBC WTF | 55 | |
| SolariaNights | XOR Properties | 15 | |
| SolariaNights | XOR Starter | 10 | |
| SolariaNights | Bytes and Big Integers | 10 | |
| SolariaNights | Base64 | 10 | |
| siwar | ASCII | 5 | |
| siwar | Network Attacks | 5 | |
| ApparentlyDirt | Encoding Challenge | 40 | |
| Acxer123 | Finding Flags | 2 | |
| entheo97 | Modular Exponentiation | 10 | |
| Gafarixo | Bytes and Big Integers | 10 | |
| nzo | Favourite byte | 20 | |
| nzo | XOR Properties | 15 | |
| m4rked | Round Keys | 20 | |
| Gafarixo | Base64 | 10 | |
| v1ct1g3r | Confusion through Substitution | 25 |
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