| Date | User | Challenge | Score |
| lakshmis3126 | Bytes and Big Integers | 10 | |
| nordenth | You either know, XOR you don't | 30 | |
| henzarafaello | Keyed Permutations | 5 | |
| twistedwheel | Modular Arithmetic 1 | 20 | |
| nordenth | Favourite byte | 20 | |
| kivand | Greatest Common Divisor | 15 | |
| nordenth | XOR Properties | 15 | |
| nordenth | XOR Starter | 10 | |
| nordenth | Bytes and Big Integers | 10 | |
| nordenth | Base64 | 10 | |
| nordenth | Hex | 5 | |
| nordenth | ASCII | 5 | |
| nordenth | Great Snakes | 3 | |
| nordenth | Finding Flags | 2 | |
| Cronoz00 | RSA Decryption | 20 | |
| Knight47k | Bytes and Big Integers | 10 | |
| Cronoz00 | Private Keys | 20 | |
| Pretam | You either know, XOR you don't | 30 | |
| Cronoz00 | Euler's Totient | 20 | |
| Cronoz00 | Public Keys | 15 | |
| Cronoz00 | Modular Exponentiation | 10 | |
| Knight47k | Base64 | 10 | |
| Mondelbrot | Great Snakes | 3 | |
| Knight47k | Hex | 5 | |
| Mondelbrot | Finding Flags | 2 | |
| JSheeder | ASCII | 5 | |
| Pretam | Favourite byte | 20 | |
| Knight47k | ASCII | 5 | |
| gabriellino1936 | Greatest Common Divisor | 15 | |
| youssef_reda | Collider | 50 | |
| ViktorPetrovich | You either know, XOR you don't | 30 | |
| Knight47k | Great Snakes | 3 | |
| ViktorPetrovich | Favourite byte | 20 | |
| togaee23 | Encoding Challenge | 40 | |
| Soisina | Modular Square Root | 35 | |
| Areej26 | ASCII | 5 | |
| Knight47k | Finding Flags | 2 | |
| Cronoz00 | Symmetry | 50 | |
| Cronoz00 | Flipping Cookie | 60 | |
| Cronoz00 | ECB CBC WTF | 55 | |
| twistedwheel | Extended GCD | 20 | |
| lemful | Lemur XOR | 40 | |
| Cronoz00 | ECB Oracle | 60 | |
| Cronoz00 | Passwords as Keys | 50 | |
| Cronoz00 | Modes of Operation Starter | 15 | |
| Cronoz00 | Bringing It All Together | 50 | |
| Cronoz00 | Diffusion through Permutation | 30 | |
| gabriellino1936 | Network Attacks | 5 | |
| ViktorPetrovich | XOR Properties | 15 | |
| gabriellino1936 | You either know, XOR you don't | 30 |
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