| Date | User | Challenge | Score |
| misterwarx | Greatest Common Divisor | 15 | |
| Vinjr | Nativity | 60 | |
| Owen6 | You either know, XOR you don't | 30 | |
| Greyvector | Finding Flags | 2 | |
| apm4n | Resisting Bruteforce | 10 | |
| tackmin1204 | No Way JOSE | 20 | |
| khanhtai | Background Reading | 5 | |
| Salikou | Great Snakes | 3 | |
| Salikou | Finding Flags | 2 | |
| aryangupta1608 | Finding Flags | 2 | |
| gene_rice_user | Gaussian Reduction | 50 | |
| Owen6 | Favourite byte | 20 | |
| whoami4 | Authenticated Handshake | 40 | |
| hiziki | Greatest Common Divisor | 15 | |
| apm4n | Keyed Permutations | 5 | |
| Owen6 | XOR Properties | 15 | |
| gene_rice_user | What's a Lattice? | 40 | |
| kjs36202 | Parameter Injection | 60 | |
| apm4n | Modular Inverting | 25 | |
| gene_rice_user | Gram Schmidt | 30 | |
| yksec | Adrien's Signs | 80 | |
| apm4n | Modular Arithmetic 2 | 20 | |
| kjs36202 | Deriving Symmetric Keys | 40 | |
| CWTerry | XOR Starter | 10 | |
| CWTerry | You either know, XOR you don't | 30 | |
| emsa | WOTS Up | 75 | |
| gene_rice_user | Size and Basis | 15 | |
| tackmin1204 | JWT Sessions | 10 | |
| davidelchido | Legendre Symbol | 35 | |
| gene_rice_user | Vectors | 10 | |
| CWTerry | Favourite byte | 20 | |
| CWTerry | XOR Properties | 15 | |
| CWTerry | Bytes and Big Integers | 10 | |
| CWTerry | Base64 | 10 | |
| pocketclown | Modes of Operation Starter | 15 | |
| CWTerry | Hex | 5 | |
| kjs36202 | Computing Shared Secrets | 30 | |
| CWTerry | ASCII | 5 | |
| Milek192 | Bytes and Big Integers | 10 | |
| kjs36202 | Computing Public Values | 25 | |
| tackmin1204 | Token Appreciation | 5 | |
| Regulag | XOR Starter | 10 | |
| yisusgam | Bytes and Big Integers | 10 | |
| CWTerry | Great Snakes | 3 | |
| CWTerry | Finding Flags | 2 | |
| jackoha | Bruce Schneier's Password: Part 2 | 250 | |
| pocketclown | Bringing It All Together | 50 | |
| Tlacaele1 | Modular Arithmetic 2 | 20 | |
| W3ster | Hex | 5 | |
| chasingC15C01337 | Crossed Wires | 100 |
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