| Date | User | Challenge | Score |
| UndercoverSquid | Bytes and Big Integers | 10 | |
| highwayhike | CERTainly not | 30 | |
| UndercoverSquid | Base64 | 10 | |
| UndercoverSquid | Hex | 5 | |
| DavidTruong | Double and Broken | 50 | |
| highwayhike | Privacy-Enhanced Mail? | 25 | |
| Satamo | Base64 | 10 | |
| gittyasois | Passwords as Keys | 50 | |
| CYDF1121 | Logon Zero | 80 | |
| UndercoverSquid | Network Attacks | 5 | |
| gittyasois | Modes of Operation Starter | 15 | |
| gittyasois | Bringing It All Together | 50 | |
| gittyasois | Diffusion through Permutation | 30 | |
| Satamo | Hex | 5 | |
| AlexEnderman | Chinese Remainder Theorem | 40 | |
| gittyasois | Confusion through Substitution | 25 | |
| Satamo | ASCII | 5 | |
| gittyasois | Round Keys | 20 | |
| gittyasois | Structure of AES | 15 | |
| gittyasois | Resisting Bruteforce | 10 | |
| supersnabel | Everything is Still Big | 100 | |
| AlexEnderman | Modular Square Root | 35 | |
| gittyasois | Keyed Permutations | 5 | |
| ahmed_1ACR | Round Keys | 20 | |
| str00ky | XOR Properties | 15 | |
| Satamo | Network Attacks | 5 | |
| superhaka | XOR Starter | 10 | |
| Satamo | Great Snakes | 3 | |
| Satamo | Finding Flags | 2 | |
| CYDF1121 | CTRIME | 70 | |
| LoopyPloofy | Modular Binomials | 80 | |
| 0xAbofiras | Base64 | 10 | |
| Learn_From_Nyamu | Passwords as Keys | 50 | |
| superhaka | Bytes and Big Integers | 10 | |
| MaxthecompFox | Extended GCD | 20 | |
| AlexEnderman | Legendre Symbol | 35 | |
| corua | Collider | 50 | |
| g4dZ0r | Flipping Cookie | 60 | |
| corua | WOTS Up 2 | 90 | |
| hidrolizuiza | You either know, XOR you don't | 30 | |
| Cheeb13 | Extended GCD | 20 | |
| highwayhike | Modular Inverting | 25 | |
| ahmed_1ACR | Structure of AES | 15 | |
| hidrolizuiza | Favourite byte | 20 | |
| corua | WOTS Up | 75 | |
| hidrolizuiza | XOR Properties | 15 | |
| sabian | Deriving Symmetric Keys | 40 | |
| sabian | Computing Shared Secrets | 30 | |
| sabian | Computing Public Values | 25 | |
| sabian | Generators of Groups | 20 |
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