| Date | User | Challenge | Score |
| forge | CTRIME | 70 | |
| kay34 | Hex | 5 | |
| grupocryptohack | Euler's Totient | 20 | |
| kay34 | ASCII | 5 | |
| KinzaZuzu | Great Snakes | 3 | |
| unixkarma | Extended GCD | 20 | |
| KinzaZuzu | Finding Flags | 2 | |
| grupocryptohack | Public Keys | 15 | |
| pseudolma | CERTainly not | 30 | |
| stellev | Size and Basis | 15 | |
| aadhi555 | XOR Properties | 15 | |
| stellev | Vectors | 10 | |
| grupocryptohack | Modular Exponentiation | 10 | |
| yoav_s | Everything is Still Big | 100 | |
| yoav_s | Crossed Wires | 100 | |
| forge | Bean Counter | 60 | |
| GrillPokerLyzka | Modular Inverting | 25 | |
| forge | Symmetry | 50 | |
| feasto | Hamiltonicity 1 | 100 | |
| forge | Triple DES | 60 | |
| forge | Lazy CBC | 60 | |
| Nexxxt | Favourite byte | 20 | |
| forge | Flipping Cookie | 60 | |
| forge | ECB Oracle | 60 | |
| unixkarma | Greatest Common Divisor | 15 | |
| Drakonvol | You either know, XOR you don't | 30 | |
| Nexxxt | XOR Properties | 15 | |
| Drakonvol | Favourite byte | 20 | |
| ssdunit | Structure of AES | 15 | |
| acastus | You either know, XOR you don't | 30 | |
| Halexeli | Bytes and Big Integers | 10 | |
| pinkierachie | Diffusion through Permutation | 30 | |
| yoav_s | Everything is Big | 70 | |
| Nexxxt | XOR Starter | 10 | |
| Drakonvol | XOR Properties | 15 | |
| feasto | Hamiltonicity (CryptoHack) | 0 | |
| Nexxxt | Bytes and Big Integers | 10 | |
| ssdunit | Resisting Bruteforce | 10 | |
| ssdunit | Keyed Permutations | 5 | |
| Fderios | Modular Inverting | 25 | |
| Nexxxt | Base64 | 10 | |
| pallas | Modular Arithmetic 2 | 20 | |
| Drakonvol | XOR Starter | 10 | |
| VuiVe | RSA or HMAC? | 35 | |
| Nexxxt | Hex | 5 | |
| Nexxxt | ASCII | 5 | |
| Drakonvol | Bytes and Big Integers | 10 | |
| GrillPokerLyzka | Modular Arithmetic 2 | 20 | |
| Nexxxt | Great Snakes | 3 | |
| Nexxxt | Finding Flags | 2 |
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