| Date | User | Challenge | Score |
| stefana_giosu | Modes of Operation Starter | 15 | |
| stefana_giosu | Bringing It All Together | 50 | |
| stefana_giosu | Diffusion through Permutation | 30 | |
| Base64 | ASCII | 5 | |
| stefana_giosu | Confusion through Substitution | 25 | |
| Base64 | Great Snakes | 3 | |
| Cisco11 | Favourite byte | 20 | |
| Cisco11 | XOR Properties | 15 | |
| Base64 | Finding Flags | 2 | |
| ShaZ | XOR Properties | 15 | |
| Cisco11 | XOR Starter | 10 | |
| namdang | Deriving Symmetric Keys | 40 | |
| yrighting | ASCII | 5 | |
| Cisco11 | Bytes and Big Integers | 10 | |
| Cisco11 | Base64 | 10 | |
| amrbkvv | Bringing It All Together | 50 | |
| Cisco11 | Hex | 5 | |
| Cisco11 | ASCII | 5 | |
| amrbkvv | Diffusion through Permutation | 30 | |
| Cisco11 | Great Snakes | 3 | |
| francois | Let's Decrypt Again | 175 | |
| bhanuPathak | Modular Arithmetic 2 | 20 | |
| valor0 | Adrien's Signs | 80 | |
| amrbkvv | Confusion through Substitution | 25 | |
| hyunie | Greatest Common Divisor | 15 | |
| Baeco | Vote for Pedro | 150 | |
| amrbkvv | Round Keys | 20 | |
| bhanuPathak | Modular Arithmetic 1 | 20 | |
| kinokith1 | Base64 | 10 | |
| amrbkvv | Structure of AES | 15 | |
| rachellthedinh | Greatest Common Divisor | 15 | |
| bhanuPathak | Extended GCD | 20 | |
| amrbkvv | Resisting Bruteforce | 10 | |
| kinokith1 | Hex | 5 | |
| amrbkvv | Keyed Permutations | 5 | |
| Cisco11 | Finding Flags | 2 | |
| kinokith1 | ASCII | 5 | |
| kinokith1 | Great Snakes | 3 | |
| kinokith1 | Finding Flags | 2 | |
| bhanuPathak | Greatest Common Divisor | 15 | |
| jinkun | Finding Flags | 2 | |
| yrighting | Network Attacks | 5 | |
| valor0 | Successive Powers | 60 | |
| TealTurtoise | Bytes and Big Integers | 10 | |
| valor0 | Chinese Remainder Theorem | 40 | |
| thainguyen_13 | Hex | 5 | |
| Baeco | Blinding Light | 120 | |
| valor0 | Modular Square Root | 35 | |
| valor0 | Legendre Symbol | 35 | |
| TheodoreW5 | Scalar Multiplication | 35 |
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