| Date | User | Challenge | Score |
| kenpachi12345678 | XOR Starter | 10 | |
| rama2130 | Scalar Multiplication | 35 | |
| hladiuc | Confusion through Substitution | 25 | |
| hladiuc | Round Keys | 20 | |
| shubh69 | ASCII | 5 | |
| th4ont | Base64 | 10 | |
| AlKafr | Network Attacks | 5 | |
| XPhuocNe | Privacy-Enhanced Mail? | 25 | |
| xinglin | XOR Properties | 15 | |
| hladiuc | Structure of AES | 15 | |
| shubh69 | Great Snakes | 3 | |
| hladiuc | Resisting Bruteforce | 10 | |
| cornn_123 | Hex | 5 | |
| misfitx | ASCII | 5 | |
| Hyunyoung_Jo | Bean Counter | 60 | |
| misfitx | Great Snakes | 3 | |
| shubh69 | Finding Flags | 2 | |
| kenpachi12345678 | Bytes and Big Integers | 10 | |
| misfitx | Finding Flags | 2 | |
| axwl03 | Greatest Common Divisor | 15 | |
| th4ont | Hex | 5 | |
| hladiuc | You either know, XOR you don't | 30 | |
| Hyunyoung_Jo | Symmetry | 50 | |
| bwtlt | Bytes and Big Integers | 10 | |
| cornn_123 | ASCII | 5 | |
| Hyunyoung_Jo | Flipping Cookie | 60 | |
| hladiuc | Favourite byte | 20 | |
| Hyunyoung_Jo | ECB CBC WTF | 55 | |
| Vasils | Working with Fields | 10 | |
| Hyunyoung_Jo | ECB Oracle | 60 | |
| hladiuc | XOR Properties | 15 | |
| Hyunyoung_Jo | Passwords as Keys | 50 | |
| hladiuc | XOR Starter | 10 | |
| hladiuc | Bytes and Big Integers | 10 | |
| cornn_123 | Great Snakes | 3 | |
| Hyunyoung_Jo | Modes of Operation Starter | 15 | |
| cornn_123 | Finding Flags | 2 | |
| Hyunyoung_Jo | Bringing It All Together | 50 | |
| hladiuc | Base64 | 10 | |
| jones0807 | Base64 | 10 | |
| zetelen | Decrypting TLS 1.2 | 30 | |
| hladiuc | Hex | 5 | |
| rama2130 | Point Addition | 30 | |
| hladiuc | ASCII | 5 | |
| jones0807 | Hex | 5 | |
| bwtlt | Base64 | 10 | |
| Hyunyoung_Jo | Diffusion through Permutation | 30 | |
| jones0807 | ASCII | 5 | |
| hladiuc | Great Snakes | 3 | |
| th4ont | ASCII | 5 |
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