| Date | User | Challenge | Score |
| NuebleZ | Finding Flags | 2 | |
| UnlamG1MA | Factoring | 15 | |
| Limepop | Finding Flags | 2 | |
| Sylpeon | Rhetorical Oracle | 100 | |
| danikpro | Greatest Common Divisor | 15 | |
| nhuhung37 | What's a Lattice? | 40 | |
| dcup | Great Snakes | 3 | |
| dcup | Finding Flags | 2 | |
| DRaE | Base64 | 10 | |
| mzz | Logon Zero | 80 | |
| 163 | Hex | 5 | |
| Fawares | Finding Flags | 2 | |
| Nohe_Cast | Privacy-Enhanced Mail? | 25 | |
| melanieberroa | Privacy-Enhanced Mail? | 25 | |
| lewalker | Bringing It All Together | 50 | |
| Sylpeon | Common Ground | 75 | |
| absimaman | Encoding Challenge | 40 | |
| DRaE | Hex | 5 | |
| M93 | Legendre Symbol | 35 | |
| snkt | Favourite byte | 20 | |
| n7867564 | Modes of Operation Starter | 15 | |
| CrankyPants | Deriving Symmetric Keys | 40 | |
| odeaus | Finding Flags | 2 | |
| lewalker | Diffusion through Permutation | 30 | |
| snkt | XOR Properties | 15 | |
| ndr | Bad Temper 2 | 150 | |
| CrankyPants | Computing Shared Secrets | 30 | |
| CrankyPants | Computing Public Values | 25 | |
| ndr | Bad Temper | 130 | |
| LACiA | Mister Saplin's Preview | 80 | |
| CrankyPants | Generators of Groups | 20 | |
| HackerX | XOR Starter | 10 | |
| snkt | XOR Starter | 10 | |
| floroo | You either know, XOR you don't | 30 | |
| lordyxzy | Great Snakes | 3 | |
| lordyxzy | Finding Flags | 2 | |
| HackerX | Bytes and Big Integers | 10 | |
| CrankyPants | Working with Fields | 10 | |
| snkt | Bytes and Big Integers | 10 | |
| CrankyPants | Modulus Inutilis | 50 | |
| floroo | Favourite byte | 20 | |
| Walid2001 | Base64 | 10 | |
| Walid2001 | Hex | 5 | |
| floroo | XOR Properties | 15 | |
| Nulpart | ASCII | 5 | |
| Hesham | Base64 | 10 | |
| Antonpo8 | Lemur XOR | 40 | |
| Walid2001 | ASCII | 5 | |
| Antonpo8 | Network Attacks | 5 | |
| floroo | XOR Starter | 10 |
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