| Date | User | Challenge | Score |
| PedroDestroyer | Bytes and Big Integers | 10 | |
| Ximaz | Base64 | 10 | |
| Ximaz | Hex | 5 | |
| peonywillow | Extended GCD | 20 | |
| Ximaz | ASCII | 5 | |
| CarsonB | Generators of Groups | 20 | |
| Ximaz | Great Snakes | 3 | |
| Ximaz | Finding Flags | 2 | |
| CarsonB | Working with Fields | 10 | |
| CYCcc | Modes of Operation Starter | 15 | |
| giardinodecorati | Curves and Logs | 40 | |
| codeninjas | Great Snakes | 3 | |
| rupyko | Bytes and Big Integers | 10 | |
| G30 | Diffusion through Permutation | 30 | |
| codeninjas | Finding Flags | 2 | |
| rupyko | Base64 | 10 | |
| Psofos | Network Attacks | 5 | |
| 0xs1nr | Modes of Operation Starter | 15 | |
| rupyko | Hex | 5 | |
| Serenity | Chinese Remainder Theorem | 40 | |
| rupyko | ASCII | 5 | |
| Muriungife | Deriving Symmetric Keys | 40 | |
| rupyko | Great Snakes | 3 | |
| Psofos | Modular Binomials | 80 | |
| Muriungife | Computing Shared Secrets | 30 | |
| j4nnlk | Modular Binomials | 80 | |
| Muriungife | Computing Public Values | 25 | |
| rupyko | Finding Flags | 2 | |
| Muriungife | Generators of Groups | 20 | |
| PedroDestroyer | Base64 | 10 | |
| Muriungife | Working with Fields | 10 | |
| Sukainah | Finding Flags | 2 | |
| Codru | Chinese Remainder Theorem | 40 | |
| Muriungife | Modulus Inutilis | 50 | |
| Askadu | Round Keys | 20 | |
| lmlA | XOR Properties | 15 | |
| Muriungife | Salty | 20 | |
| peonywillow | Greatest Common Divisor | 15 | |
| Muriungife | Manyprime | 40 | |
| Ali_son | ASCII | 5 | |
| Muriungife | Monoprime | 30 | |
| Askadu | Structure of AES | 15 | |
| Muriungife | Factoring | 15 | |
| peonywillow | You either know, XOR you don't | 30 | |
| duongsec | Hex | 5 | |
| PedroDestroyer | Hex | 5 | |
| G30 | Confusion through Substitution | 25 | |
| CarsonB | Monoprime | 30 | |
| kyalo | Resisting Bruteforce | 10 | |
| Askadu | Resisting Bruteforce | 10 |
You are now level Current level