| Date | User | Challenge | Score |
| lucky123 | Euler's Totient | 20 | |
| valerabundus | XOR Properties | 15 | |
| cosminradu2603 | You either know, XOR you don't | 30 | |
| valerabundus | XOR Starter | 10 | |
| caiwenjun | Factoring | 15 | |
| valerabundus | Bytes and Big Integers | 10 | |
| stareat | Factoring | 15 | |
| luchy | You either know, XOR you don't | 30 | |
| dytsld1031 | Factoring | 15 | |
| luchy | Favourite byte | 20 | |
| valerabundus | Base64 | 10 | |
| luchy | XOR Properties | 15 | |
| lucky123 | Public Keys | 15 | |
| soln1k | You either know, XOR you don't | 30 | |
| soln1k | Favourite byte | 20 | |
| valerabundus | Hex | 5 | |
| soln1k | XOR Properties | 15 | |
| luchy | XOR Starter | 10 | |
| soln1k | XOR Starter | 10 | |
| luchy | Bytes and Big Integers | 10 | |
| soln1k | Bytes and Big Integers | 10 | |
| soln1k | Base64 | 10 | |
| soln1k | Hex | 5 | |
| soln1k | ASCII | 5 | |
| soln1k | Great Snakes | 3 | |
| lucky123 | Modular Exponentiation | 10 | |
| luchy | Base64 | 10 | |
| valerabundus | ASCII | 5 | |
| luchy | Hex | 5 | |
| soln1k | Finding Flags | 2 | |
| valerabundus | Great Snakes | 3 | |
| luchy | ASCII | 5 | |
| Doku | WOTS Up 2 | 90 | |
| luchy | Great Snakes | 3 | |
| Doku | WOTS Up | 75 | |
| Doku | Merkle Trees | 25 | |
| valerabundus | Finding Flags | 2 | |
| kristoferUA | Base64 | 10 | |
| Doku | Invariant | 250 | |
| Doku | Mixed Up | 120 | |
| Doku | No Difference | 175 | |
| luchy | Finding Flags | 2 | |
| Doku | PriMeD5 | 100 | |
| Doku | Hash Stuffing | 50 | |
| Doku | Collider | 50 | |
| Doku | Saying Hello | 20 | |
| Cupi | Everything is Big | 70 | |
| Doku | Sharks on the Wire | 10 | |
| Doku | Secure Protocols | 5 | |
| Doku | RSA or HMAC? Part 2 | 100 |
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