| Date | User | Challenge | Score |
| Yugansh | Computing Public Values | 25 | |
| Yugansh | Generators of Groups | 20 | |
| Yugansh | Working with Fields | 10 | |
| glrz01 | You either know, XOR you don't | 30 | |
| blinkiew | Favourite byte | 20 | |
| dirtyDeedz | Generators of Groups | 20 | |
| Yeonjae | Base64 | 10 | |
| ShedoZmb | Passwords as Keys | 50 | |
| ahmadnaghibi | Hex | 5 | |
| cyberdark | XOR Properties | 15 | |
| glrz01 | Favourite byte | 20 | |
| thanosss | Symmetry | 50 | |
| chelinh | Quadratic Residues | 25 | |
| cyberdark | XOR Starter | 10 | |
| ShedoZmb | Modes of Operation Starter | 15 | |
| blinkiew | XOR Properties | 15 | |
| cyberdark | Bytes and Big Integers | 10 | |
| cyberdark | Base64 | 10 | |
| ahmadnaghibi | ASCII | 5 | |
| ShedoZmb | Bringing It All Together | 50 | |
| glrz01 | XOR Properties | 15 | |
| 0xMero | XOR Starter | 10 | |
| cyberdark | Hex | 5 | |
| cyberdark | ASCII | 5 | |
| cyberdark | Great Snakes | 3 | |
| ShedoZmb | Successive Powers | 60 | |
| cyberdark | Finding Flags | 2 | |
| glrz01 | XOR Starter | 10 | |
| ShedoZmb | Transparency | 50 | |
| kzzm | No Difference | 175 | |
| syadidd | Structure of AES | 15 | |
| verion | Great Snakes | 3 | |
| omuricetomatosau | Base64 | 10 | |
| omuricetomatosau | Hex | 5 | |
| aravhacks | Bytes and Big Integers | 10 | |
| ShedoZmb | SSH Keys | 35 | |
| omuricetomatosau | ASCII | 5 | |
| omuricetomatosau | Great Snakes | 3 | |
| glrz01 | Bytes and Big Integers | 10 | |
| ShedoZmb | CERTainly not | 30 | |
| hanahiennguyen | RSA Decryption | 20 | |
| Yeonjae | Hex | 5 | |
| omuricetomatosau | Finding Flags | 2 | |
| ShedoZmb | Privacy-Enhanced Mail? | 25 | |
| glrz01 | Base64 | 10 | |
| character | Modular Inverting | 25 | |
| kiwibird | Bytes and Big Integers | 10 | |
| character | Modular Arithmetic 2 | 20 | |
| character | Modular Arithmetic 1 | 20 | |
| hanahiennguyen | Private Keys | 20 |
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