| Date | User | Challenge | Score |
| rapippemula | Hex | 5 | |
| scaff | Network Attacks | 5 | |
| r4shsec | Extended GCD | 20 | |
| 1502dthw | Modulus Inutilis | 50 | |
| Rohan_Kapri | SSH Keys | 35 | |
| Rohan_Kapri | CERTainly not | 30 | |
| 1502dthw | Salty | 20 | |
| Rohan_Kapri | Privacy-Enhanced Mail? | 25 | |
| 1502dthw | Manyprime | 40 | |
| Rohan_Kapri | Modular Inverting | 25 | |
| Rohan_Kapri | Modular Arithmetic 2 | 20 | |
| Rohan_Kapri | Modular Arithmetic 1 | 20 | |
| Rohan_Kapri | Extended GCD | 20 | |
| bakayarooo | XOR Properties | 15 | |
| r4shsec | Greatest Common Divisor | 15 | |
| Rohan_Kapri | Greatest Common Divisor | 15 | |
| Rohan_Kapri | Lemur XOR | 40 | |
| Rohan_Kapri | Encoding Challenge | 40 | |
| ealona | XOR Properties | 15 | |
| zal | Extended GCD | 20 | |
| Rohan_Kapri | Network Attacks | 5 | |
| kamalnayan50 | Quadratic Residues | 25 | |
| Rohan_Kapri | You either know, XOR you don't | 30 | |
| Rohan_Kapri | Favourite byte | 20 | |
| Rohan_Kapri | XOR Properties | 15 | |
| Rohan_Kapri | XOR Starter | 10 | |
| zal | Greatest Common Divisor | 15 | |
| Rohan_Kapri | Bytes and Big Integers | 10 | |
| y0dam4n | Unencryptable | 125 | |
| QuinCyber | XOR Properties | 15 | |
| Rohan_Kapri | Base64 | 10 | |
| Rohan_Kapri | Hex | 5 | |
| Rohan_Kapri | ASCII | 5 | |
| KrakenBacker | Bytes and Big Integers | 10 | |
| Rohan_Kapri | Great Snakes | 3 | |
| AMIRUL_DC99812 | Base64 | 10 | |
| AMIRUL_DC99812 | Hex | 5 | |
| AMIRUL_DC99812 | ASCII | 5 | |
| hungtrab | CTRIME | 70 | |
| QuinCyber | XOR Starter | 10 | |
| zal | Modular Inverting | 25 | |
| rev_cryp | Modular Exponentiation | 10 | |
| zal | Modular Arithmetic 2 | 20 | |
| zal | Modular Arithmetic 1 | 20 | |
| Wofb | Network Attacks | 5 | |
| zal | Factoring | 15 | |
| zal | Inferius Prime | 30 | |
| AMIRUL_DC99812 | Great Snakes | 3 | |
| KrakenBacker | Base64 | 10 | |
| hungtrab | Triple DES | 60 |
You are now level Current level