| Date | User | Challenge | Score |
| und3d | Bytes and Big Integers | 10 | |
| Nifty | Greatest Common Divisor | 15 | |
| Heazzy | Modular Inverting | 25 | |
| Catropic | XOR Properties | 15 | |
| Anna_G142 | Network Attacks | 5 | |
| und3d | Base64 | 10 | |
| Catropic | XOR Starter | 10 | |
| und3d | Hex | 5 | |
| Heazzy | Modular Arithmetic 2 | 20 | |
| und3d | ASCII | 5 | |
| Catropic | Bytes and Big Integers | 10 | |
| Nifty | You either know, XOR you don't | 30 | |
| Catropic | Base64 | 10 | |
| Nifty | Favourite byte | 20 | |
| Catropic | Hex | 5 | |
| Catropic | ASCII | 5 | |
| Nifty | XOR Properties | 15 | |
| Catropic | Great Snakes | 3 | |
| und3d | Great Snakes | 3 | |
| und3d | Finding Flags | 2 | |
| kkaroly | CTRIME | 70 | |
| Catropic | Finding Flags | 2 | |
| DinoGun | Bytes and Big Integers | 10 | |
| DinoGun | Base64 | 10 | |
| DinoGun | Hex | 5 | |
| kinggauss | You either know, XOR you don't | 30 | |
| DinoGun | ASCII | 5 | |
| kinggauss | Favourite byte | 20 | |
| kinggauss | XOR Properties | 15 | |
| Mikbrosim | Checkpoint | 150 | |
| momingle | Extended GCD | 20 | |
| kinggauss | XOR Starter | 10 | |
| fucla | Resisting Bruteforce | 10 | |
| fucla | Keyed Permutations | 5 | |
| Dfirtester | Finding Flags | 2 | |
| nisrbo | Favourite byte | 20 | |
| abdullah_51 | Round Keys | 20 | |
| daVinciLeo | Base64 | 10 | |
| un5h4d0w | Modular Inverting | 25 | |
| momingle | Greatest Common Divisor | 15 | |
| zinccannon | ECB CBC WTF | 55 | |
| nisrbo | XOR Properties | 15 | |
| abdullah_51 | Structure of AES | 15 | |
| nisrbo | XOR Starter | 10 | |
| nathaniel2407 | Base64 | 10 | |
| daVinciLeo | Hex | 5 | |
| Bachatero | Modulus Inutilis | 50 | |
| fucla | Modular Binomials | 80 | |
| daVinciLeo | ASCII | 5 | |
| nathaniel2407 | Hex | 5 |
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