| Date | User | Challenge | Score |
| UMAyuma | Modular Binomials | 80 | |
| yuanjiang | Bytes and Big Integers | 10 | |
| xavionun | Modular Arithmetic 1 | 20 | |
| yuanjiang | Base64 | 10 | |
| Dimbls | Round Keys | 20 | |
| xavionun | Extended GCD | 20 | |
| yuanjiang | Hex | 5 | |
| sdigs | XOR Starter | 10 | |
| Dimbls | Structure of AES | 15 | |
| Chtupv_22 | Extended GCD | 20 | |
| igrdvd13 | Great Snakes | 3 | |
| Dimbls | Resisting Bruteforce | 10 | |
| pad0009 | Finding Flags | 2 | |
| caledt | RSA Decryption | 20 | |
| igrdvd13 | Finding Flags | 2 | |
| Dimbls | Keyed Permutations | 5 | |
| Chtupv_22 | Greatest Common Divisor | 15 | |
| Chtupv_22 | You either know, XOR you don't | 30 | |
| mochaowo | CTRIME | 70 | |
| Dimbls | Salty | 20 | |
| crispyleaf | Modular Square Root | 35 | |
| rutuja | Greatest Common Divisor | 15 | |
| UMAyuma | Adrien's Signs | 80 | |
| Astrolobe853 | XOR Properties | 15 | |
| xavionun | Greatest Common Divisor | 15 | |
| ZUIEKI_kicktv | You either know, XOR you don't | 30 | |
| neftaligarcia291 | Great Snakes | 3 | |
| neftaligarcia291 | Finding Flags | 2 | |
| AlanYT | Network Attacks | 5 | |
| AlanYT | Great Snakes | 3 | |
| AlanYT | Finding Flags | 2 | |
| kevinho27 | Base64 | 10 | |
| AbysmalNightmare | Base64 | 10 | |
| kevinho27 | Hex | 5 | |
| ZUIEKI_kicktv | Favourite byte | 20 | |
| einwickler | You either know, XOR you don't | 30 | |
| AbysmalNightmare | Hex | 5 | |
| danieldegracia81 | Base64 | 10 | |
| mileybis21 | Base64 | 10 | |
| kevinho27 | ASCII | 5 | |
| mileybis21 | Hex | 5 | |
| danieldegracia81 | Hex | 5 | |
| mileybis21 | ASCII | 5 | |
| xavionun | You either know, XOR you don't | 30 | |
| danieldegracia81 | ASCII | 5 | |
| mileybis21 | Great Snakes | 3 | |
| kevinho27 | Great Snakes | 3 | |
| danieldegracia81 | Great Snakes | 3 | |
| AbysmalNightmare | ASCII | 5 | |
| mileybis21 | Finding Flags | 2 |
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