| Date | User | Challenge | Score |
| hamka | Hex | 5 | |
| gitaandnii | Extended GCD | 20 | |
| sixsquareAI | One Round Crypto (ECSC 2024 (Italy)) | 0 | |
| g3k1 | CTRIME | 70 | |
| mboh2 | Private Keys | 20 | |
| aleph00 | Finding Flags | 2 | |
| dohun | Hex | 5 | |
| gitaandnii | Greatest Common Divisor | 15 | |
| g3k1 | Triple DES | 60 | |
| mboh2 | Euler's Totient | 20 | |
| Ter3Sni | Moving Problems | 150 | |
| dohun | ASCII | 5 | |
| g3k1 | Lazy CBC | 60 | |
| mrrexdr | Hex | 5 | |
| TinyTicky | Favourite byte | 20 | |
| canaryda | Prime and Prejudice | 200 | |
| mrrexdr | ASCII | 5 | |
| Ender_hakeri | Extended GCD | 20 | |
| mrrexdr | Great Snakes | 3 | |
| mrrexdr | Finding Flags | 2 | |
| sp1n0z4 | RSA Backdoor Viability | 175 | |
| sasharudick | ECB Oracle | 60 | |
| g3k1 | Bean Counter | 60 | |
| sasharudick | Passwords as Keys | 50 | |
| sasharudick | Modes of Operation Starter | 15 | |
| sasharudick | Bringing It All Together | 50 | |
| sasharudick | Diffusion through Permutation | 30 | |
| sasharudick | Confusion through Substitution | 25 | |
| Sabrinadewinda | Modular Binomials | 80 | |
| dohun | Great Snakes | 3 | |
| dohun | Finding Flags | 2 | |
| g3k1 | Flipping Cookie | 60 | |
| labcoxyzl | Blind (ECSC 2023 (Norway)) | 0 | |
| olexenn | Modular Inverting | 25 | |
| g3k1 | ECB CBC WTF | 55 | |
| MrCobblepot | Quadratic Residues | 25 | |
| sasharudick | Round Keys | 20 | |
| oldchip | Great Snakes | 3 | |
| Heba_Ajjour | Round Keys | 20 | |
| labcoxyzl | Ticket Maestro (CryptoHack) | 0 | |
| Sabrinadewinda | Adrien's Signs | 80 | |
| TinyTicky | XOR Properties | 15 | |
| sasharudick | Structure of AES | 15 | |
| olexenn | Modular Arithmetic 2 | 20 | |
| sasharudick | Resisting Bruteforce | 10 | |
| Sabrinadewinda | Chinese Remainder Theorem | 40 | |
| sasharudick | Keyed Permutations | 5 | |
| AceX987 | Computing Public Values | 25 | |
| AceX987 | Working with Fields | 10 | |
| Sabrinadewinda | Modular Square Root | 35 |
You are now level Current level