| Date | User | Challenge | Score |
| jacekstrzalkowsk | Lazy CBC | 60 | |
| dharneegan | Chinese Remainder Theorem | 40 | |
| tenagazaru | Extended GCD | 20 | |
| jacekstrzalkowsk | Flipping Cookie | 60 | |
| Valendula | Bringing It All Together | 50 | |
| randomstar | Network Attacks | 5 | |
| Bettacchi | Base64 | 10 | |
| tenagazaru | Greatest Common Divisor | 15 | |
| jacekstrzalkowsk | ECB Oracle | 60 | |
| randomstar | Base64 | 10 | |
| TnT_DG | Parameter Injection | 60 | |
| randomstar | Hex | 5 | |
| pawlik | Triple DES | 60 | |
| Fronczyk_Mateusz | Marin's Secrets | 50 | |
| Maizar | Vote for Pedro | 150 | |
| zreddx | Modular Inverting | 25 | |
| randomstar | ASCII | 5 | |
| randomstar | Great Snakes | 3 | |
| TnT_DG | Deriving Symmetric Keys | 40 | |
| nadkio | Finding Flags | 2 | |
| randomstar | Finding Flags | 2 | |
| ENSALADA | Base64 | 10 | |
| Maizar | Blinding Light | 120 | |
| TnT_DG | Computing Shared Secrets | 30 | |
| ENSALADA | Hex | 5 | |
| MonstarInside | Finding Flags | 2 | |
| Maizar | Let's Decrypt | 80 | |
| galsabag | ASCII | 5 | |
| hwan | Symmetry | 50 | |
| galsabag | Great Snakes | 3 | |
| Bellaklklkl | Modes of Operation Starter | 15 | |
| redishcar | Bytes and Big Integers | 10 | |
| galsabag | Finding Flags | 2 | |
| tjoyeux | Base64 | 10 | |
| ENSALADA | ASCII | 5 | |
| ENSALADA | Great Snakes | 3 | |
| shangzhe | ASCII | 5 | |
| hau | Computing Public Values | 25 | |
| catalin_munteanu | Extended GCD | 20 | |
| ENSALADA | Finding Flags | 2 | |
| Fronczyk_Mateusz | Fast Primes | 75 | |
| nabbiinn | Modes of Operation Starter | 15 | |
| Maizar | Signing Server | 60 | |
| Thaimeo2006 | Base64 | 10 | |
| Tran_Hinh_Loai | Confusion through Substitution | 25 | |
| nabbiinn | Bringing It All Together | 50 | |
| 303945 | Blinding Light | 120 | |
| hau | Generators of Groups | 20 | |
| Hansi | Modular Inverting | 25 | |
| Fronczyk_Mateusz | Infinite Descent | 50 |
You are now level Current level