| Date | User | Challenge | Score |
| AESpider | Greatest Common Divisor | 15 | |
| ebram_isaac | Base64 | 10 | |
| AESpider | Lemur XOR | 40 | |
| exoskellyman | ASCII | 5 | |
| ebram_isaac | Hex | 5 | |
| ebram_isaac | ASCII | 5 | |
| yousfi | Keyed Permutations | 5 | |
| AESpider | You either know, XOR you don't | 30 | |
| AESpider | Favourite byte | 20 | |
| AESpider | XOR Properties | 15 | |
| Dimalano | CTRIME | 70 | |
| doublejue | Confusion through Substitution | 25 | |
| exoskellyman | Great Snakes | 3 | |
| AESpider | XOR Starter | 10 | |
| exoskellyman | Finding Flags | 2 | |
| light_yagami | Great Snakes | 3 | |
| MrD | Smooth Criminal | 60 | |
| crack_head | Modular Inverting | 25 | |
| 10ball | Extended GCD | 20 | |
| AESpider | Encoding Challenge | 40 | |
| light_yagami | Finding Flags | 2 | |
| AESpider | Bytes and Big Integers | 10 | |
| badatpython | XOR Starter | 10 | |
| Akylbek | Real Eisenstein | 150 | |
| AESpider | Base64 | 10 | |
| crack_head | Modular Arithmetic 2 | 20 | |
| isac | Finding Flags | 2 | |
| Akylbek | Unencryptable | 125 | |
| AESpider | Hex | 5 | |
| jhh0406 | Elliptic Nodes | 150 | |
| AESpider | ASCII | 5 | |
| Akylbek | Roll your Own | 125 | |
| Akylbek | Ellipse Curve Cryptography | 125 | |
| Akylbek | No Way Back Home | 100 | |
| Akylbek | Broken RSA | 100 | |
| crack_head | Modular Arithmetic 1 | 20 | |
| Akylbek | Modular Binomials | 80 | |
| Akylbek | Adrien's Signs | 80 | |
| Akylbek | Successive Powers | 60 | |
| Akylbek | Chinese Remainder Theorem | 40 | |
| crack_head | Extended GCD | 20 | |
| sp0okiyy | Bytes and Big Integers | 10 | |
| Akylbek | Modular Square Root | 35 | |
| kelia_s | Greatest Common Divisor | 15 | |
| Akylbek | Legendre Symbol | 35 | |
| Akylbek | Quadratic Residues | 25 | |
| jhh0406 | Micro Transmissions | 120 | |
| Random10xDev | You either know, XOR you don't | 30 | |
| shokapikfort | Background Reading | 5 | |
| ewhite | Modular Binomials | 80 |
You are now level Current level