| Date | User | Challenge | Score |
| NoBirdWasHam | ZKP Introduction | 5 | |
| gluecicle | Confusion through Substitution | 25 | |
| __arsen_poghosya | Modes of Operation Starter | 15 | |
| PeterKosiara | Network Attacks | 5 | |
| Canedo | Finding Flags | 2 | |
| nishikawa | Finding Flags | 2 | |
| __arsen_poghosya | Bringing It All Together | 50 | |
| k1iillx | Passwords as Keys | 50 | |
| GrimScythe2001 | Oh SNAP | 120 | |
| roogs22 | Flipping Cookie | 60 | |
| Elidan | XOR Properties | 15 | |
| n0qword | Resisting Bruteforce | 10 | |
| stc15 | Quadratic Residues | 25 | |
| Abstract | Scalar Multiplication | 35 | |
| 4yru5 | XOR Properties | 15 | |
| Lofer | Missing Modulus | 80 | |
| veqi | Base64 | 10 | |
| TrouthieCryptHk | Working with Fields | 10 | |
| gluecicle | Round Keys | 20 | |
| parrot3 | Euler's Totient | 20 | |
| gokulavasan | Adrien's Signs | 80 | |
| parrot3 | Public Keys | 15 | |
| n0qword | Keyed Permutations | 5 | |
| veqi | Hex | 5 | |
| karlos9060 | XOR Starter | 10 | |
| herbertgarrison | Passwords as Keys | 50 | |
| chahinaze | You either know, XOR you don't | 30 | |
| shreshth44 | No Difference | 175 | |
| studentunique | Successive Powers | 60 | |
| stc15 | Modular Inverting | 25 | |
| 0xFFFFFF | Encoding Challenge | 40 | |
| veqi | ASCII | 5 | |
| 4yru5 | XOR Starter | 10 | |
| tracelyon | Base64 | 10 | |
| tracelyon | Hex | 5 | |
| Binhter | Favourite byte | 20 | |
| stc15 | Modular Arithmetic 2 | 20 | |
| lukianenkolili | ASCII | 5 | |
| chahinaze | Favourite byte | 20 | |
| Chuzz38 | Modular Binomials | 80 | |
| tracelyon | ASCII | 5 | |
| PeterKosiara | Great Snakes | 3 | |
| veqi | Great Snakes | 3 | |
| turska | Proofs of Knowledge | 20 | |
| hhcakir | Great Snakes | 3 | |
| kitchen_sink | You either know, XOR you don't | 30 | |
| tracelyon | Great Snakes | 3 | |
| PeterKosiara | Finding Flags | 2 | |
| hhcakir | Finding Flags | 2 | |
| lukianenkolili | Great Snakes | 3 |
You are now level Current level