| Date | User | Challenge | Score |
| moonheesung | Deriving Symmetric Keys | 40 | |
| z4ibi | Passwords as Keys | 50 | |
| z4ibi | Modes of Operation Starter | 15 | |
| PJ696769 | Passwords as Keys | 50 | |
| patientlegend | Modular Arithmetic 2 | 20 | |
| xsyshuai | Structure of AES | 15 | |
| patientlegend | Modular Arithmetic 1 | 20 | |
| xsyshuai | Resisting Bruteforce | 10 | |
| patientlegend | Extended GCD | 20 | |
| z4ibi | Bringing It All Together | 50 | |
| xsyshuai | Keyed Permutations | 5 | |
| xsyshuai | Modular Arithmetic 2 | 20 | |
| xsyshuai | Modular Arithmetic 1 | 20 | |
| z4ibi | Diffusion through Permutation | 30 | |
| xsyshuai | Extended GCD | 20 | |
| xsyshuai | Greatest Common Divisor | 15 | |
| xsyshuai | You either know, XOR you don't | 30 | |
| xsyshuai | Favourite byte | 20 | |
| ripper | Lemur XOR | 40 | |
| ripper | You either know, XOR you don't | 30 | |
| ripper | Favourite byte | 20 | |
| ripper | XOR Properties | 15 | |
| ripper | XOR Starter | 10 | |
| ripper | Encoding Challenge | 40 | |
| xsyshuai | XOR Properties | 15 | |
| xsyshuai | XOR Starter | 10 | |
| xsyshuai | Bytes and Big Integers | 10 | |
| xsyshuai | Base64 | 10 | |
| xsyshuai | Hex | 5 | |
| skkra0 | Modular Arithmetic 1 | 20 | |
| skkra0 | Extended GCD | 20 | |
| ripper | Bytes and Big Integers | 10 | |
| ripper | Base64 | 10 | |
| nomadjmk | Great Snakes | 3 | |
| ripper | Hex | 5 | |
| nomadjmk | Finding Flags | 2 | |
| ripper | ASCII | 5 | |
| ripper | Network Attacks | 5 | |
| User0069 | Lo-Hi Card Game | 120 | |
| ripper | Great Snakes | 3 | |
| ripper | Finding Flags | 2 | |
| Adrinn | Diffusion through Permutation | 30 | |
| PJ696769 | Modes of Operation Starter | 15 | |
| Camilaqll | Bytes and Big Integers | 10 | |
| Linyx | Legendre Symbol | 35 | |
| 4ndn | Great Snakes | 3 | |
| Haikall | Bringing It All Together | 50 | |
| 4ndn | Finding Flags | 2 | |
| n30nx | Decrypting TLS 1.3 | 35 | |
| grazkaa | Bounded Noise | 50 |
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