| Date | User | Challenge | Score |
| Tashome | Bean Counter | 60 | |
| DaltonM | Structure of AES | 15 | |
| Tashome | Symmetry | 50 | |
| meowmiawmiau | Base64 | 10 | |
| Tashome | ECB CBC WTF | 55 | |
| nervnyjsmech | ASCII | 5 | |
| Tashome | Flipping Cookie | 60 | |
| Bol | Great Snakes | 3 | |
| ramzhaz | Bytes and Big Integers | 10 | |
| meowmiawmiau | Hex | 5 | |
| Astorice | RSA Signatures | 25 | |
| meowmiawmiau | ASCII | 5 | |
| nervnyjsmech | Great Snakes | 3 | |
| nervnyjsmech | Finding Flags | 2 | |
| Moracha | ECB Oracle | 60 | |
| AlfredKilonzo | Bean Counter | 60 | |
| EOGWAYO | Symmetry | 50 | |
| zehra | Favourite byte | 20 | |
| Tashome | ECB Oracle | 60 | |
| whaoe | Legendre Symbol | 35 | |
| Raccoon42 | Common Ground | 75 | |
| zehra | XOR Properties | 15 | |
| 169768 | Bean Counter | 60 | |
| Bol | Finding Flags | 2 | |
| olaf37 | Hex | 5 | |
| stacymwangi | Modes of Operation Starter | 15 | |
| VuDuong | Generators of Groups | 20 | |
| 169768 | Symmetry | 50 | |
| ssk0yy01_ | You either know, XOR you don't | 30 | |
| 169768 | Flipping Cookie | 60 | |
| m3m0d | Finding Flags | 2 | |
| Tashome | Passwords as Keys | 50 | |
| gll | Export-grade | 100 | |
| 169768 | ECB CBC WTF | 55 | |
| Tashome | Modes of Operation Starter | 15 | |
| 169768 | ECB Oracle | 60 | |
| ApexRatio | Confusion through Substitution | 25 | |
| Papalo007 | Point Negation | 10 | |
| EOGWAYO | Flipping Cookie | 60 | |
| serds | Modular Arithmetic 2 | 20 | |
| theMunyao | Euler's Totient | 20 | |
| stacymwangi | Bringing It All Together | 50 | |
| EOGWAYO | ECB CBC WTF | 55 | |
| theMunyao | Public Keys | 15 | |
| olaf37 | ASCII | 5 | |
| Ivannn | ECB CBC WTF | 55 | |
| Raccoon42 | A Twisted Mind | 80 | |
| olaf37 | Great Snakes | 3 | |
| stacymwangi | Diffusion through Permutation | 30 | |
| DaltonM | Resisting Bruteforce | 10 |
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