| Date | User | Challenge | Score |
| kustkzn | SSH Keys | 35 | |
| Mago_Implacavel | Real Eisenstein | 150 | |
| giokaxo | Finding Flags | 2 | |
| kustkzn | CERTainly not | 30 | |
| Vanquishlynx | Structure of AES | 15 | |
| pastimeplays | Pad Thai | 80 | |
| h4x0r3rr0r | Monoprime | 30 | |
| reber | Private Keys | 20 | |
| SylvBarb | Paper Plane | 120 | |
| szeter | Favourite byte | 20 | |
| HaydenGibs | Finding Flags | 2 | |
| osihlovec | Signing Server | 60 | |
| Fronczyk_Mateusz | Factoring | 15 | |
| Rayenb1 | Finding Flags | 2 | |
| michkied | Favourite byte | 20 | |
| reber | Euler's Totient | 20 | |
| kustkzn | OR Proof | 75 | |
| kustkzn | OR Proof (CryptoHack) | 0 | |
| JaySlade | Resisting Bruteforce | 10 | |
| Etern1ty | Ron was Wrong, Whit is Right | 90 | |
| michkied | XOR Properties | 15 | |
| JaySlade | Keyed Permutations | 5 | |
| szeter | XOR Properties | 15 | |
| tig3rpuppet | Quadratic Residues | 25 | |
| Fronczyk_Mateusz | RSA Signatures | 25 | |
| reber | Public Keys | 15 | |
| pin | Backpack Cryptography | 120 | |
| useless | Factoring | 15 | |
| tig3rpuppet | Modular Inverting | 25 | |
| Vanquishlynx | Resisting Bruteforce | 10 | |
| Odette_Swan | XOR Properties | 15 | |
| SillyCircuit | You either know, XOR you don't | 30 | |
| reber | Modular Exponentiation | 10 | |
| M4DD0C74 | Modular Binomials | 80 | |
| tig3rpuppet | Modular Arithmetic 2 | 20 | |
| Cadaeib65 | Efficient Exchange | 50 | |
| chopingang | ECB CBC WTF | 55 | |
| SillyCircuit | Favourite byte | 20 | |
| michkied | XOR Starter | 10 | |
| hossam_11 | Extended GCD | 20 | |
| tig3rpuppet | Modular Arithmetic 1 | 20 | |
| SillyCircuit | XOR Properties | 15 | |
| tig3rpuppet | Extended GCD | 20 | |
| SillyCircuit | XOR Starter | 10 | |
| Dreamboat | Extended GCD | 20 | |
| hossam_11 | Greatest Common Divisor | 15 | |
| m0x90 | Triple DES | 60 | |
| michkied | Encoding Challenge | 40 | |
| kaminuma | Hex | 5 | |
| patryk | Chinese Remainder Theorem | 40 |
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