| Date | User | Challenge | Score |
| Paul_Learner | Hex | 5 | |
| davidhbookclub | Point Addition | 30 | |
| jhillman | The j-invariant | 20 | |
| misfitx | Bytes and Big Integers | 10 | |
| ismailferdi | Modular Arithmetic 1 | 20 | |
| EvolutionzXD | Point Addition | 30 | |
| ismailferdi | Extended GCD | 20 | |
| KwonByeongjun | Bean Counter | 60 | |
| KwonByeongjun | Symmetry | 50 | |
| shamandeer | Resisting Bruteforce | 10 | |
| th4ont | Favourite byte | 20 | |
| KwonByeongjun | Flipping Cookie | 60 | |
| th4ont | XOR Properties | 15 | |
| misfitx | Network Attacks | 5 | |
| KwonByeongjun | ECB CBC WTF | 55 | |
| kruskof | Finding Flags | 2 | |
| KwonByeongjun | ECB Oracle | 60 | |
| EvolutionzXD | Point Negation | 10 | |
| cornn_123 | Bytes and Big Integers | 10 | |
| zetelen | Decrypting TLS 1.3 | 35 | |
| xinglin | Favourite byte | 20 | |
| spy003 | Keyed Permutations | 5 | |
| th4ont | XOR Starter | 10 | |
| shubh69 | Hex | 5 | |
| misfitx | Base64 | 10 | |
| bwtlt | XOR Starter | 10 | |
| misfitx | Hex | 5 | |
| xth_student | Point Negation | 10 | |
| Theodo | Nativity | 60 | |
| cornn_123 | Base64 | 10 | |
| th4ont | Bytes and Big Integers | 10 | |
| 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 |
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