| Date | User | Challenge | Score |
| Kiima | Hex | 5 | |
| m0x___ | Extended GCD | 20 | |
| abhi7056 | Finding Flags | 2 | |
| ZhangJing | Bytes and Big Integers | 10 | |
| Kiima | ASCII | 5 | |
| francuccio08 | XOR Starter | 10 | |
| mOhanaa | Bytes and Big Integers | 10 | |
| 4AAA4 | Endless Emails | 150 | |
| ZhangJing | Base64 | 10 | |
| francuccio08 | Encoding Challenge | 40 | |
| Cerades | Bruce Schneier's Password: Part 2 | 250 | |
| walidwithou | Round Keys | 20 | |
| hacker964 | XOR Properties | 15 | |
| francuccio08 | ASCII | 5 | |
| m0x___ | Greatest Common Divisor | 15 | |
| slycro | Lo-Hi Card Game | 120 | |
| Paketik | Great Snakes | 3 | |
| Paketik | Finding Flags | 2 | |
| shri69 | Quadratic Residues | 25 | |
| 24BECSE19_DT | Forbidden Fruit | 150 | |
| 24BECSE19_DT | Paper Plane | 120 | |
| SiddhiAgrawal | ASCII | 5 | |
| asma26 | Bytes and Big Integers | 10 | |
| Jalal13 | Finding Flags | 2 | |
| ZhangJing | Hex | 5 | |
| asma26 | Base64 | 10 | |
| SiddhiAgrawal | Finding Flags | 2 | |
| gogmaza | Favourite byte | 20 | |
| asma26 | Hex | 5 | |
| francuccio08 | Bytes and Big Integers | 10 | |
| francuccio08 | Base64 | 10 | |
| penguinpenguinpe | ECB CBC WTF | 55 | |
| withwhom | Adrien's Signs | 80 | |
| walidwithou | Structure of AES | 15 | |
| francuccio08 | Hex | 5 | |
| francuccio08 | Great Snakes | 3 | |
| hvinh | Finding Flags | 2 | |
| francuccio08 | Finding Flags | 2 | |
| penguinpenguinpe | Round Keys | 20 | |
| walidwithou | Resisting Bruteforce | 10 | |
| Sygon_Kk08 | You either know, XOR you don't | 30 | |
| walidwithou | Keyed Permutations | 5 | |
| Mai47 | Broken RSA | 100 | |
| estoic_identity | Modular Binomials | 80 | |
| alaaabdu | Network Attacks | 5 | |
| alaaabdu | Great Snakes | 3 | |
| alaaabdu | Finding Flags | 2 | |
| Mukeshburdak | Confusion through Substitution | 25 | |
| IlyShaayaya | Resisting Bruteforce | 10 | |
| IlyShaayaya | Keyed Permutations | 5 |
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