| Date | User | Challenge | Score |
| Fenek007 | XOR Starter | 10 | |
| adagbla | Base64 | 10 | |
| gathman | Base64 | 10 | |
| Aircloud0030 | XOR Properties | 15 | |
| adagbla | Hex | 5 | |
| Fenek007 | Bytes and Big Integers | 10 | |
| adagbla | ASCII | 5 | |
| adagbla | Great Snakes | 3 | |
| adagbla | Finding Flags | 2 | |
| lve_yu | Modular Arithmetic 2 | 20 | |
| miksquared | SSH Keys | 35 | |
| lve_yu | Modular Arithmetic 1 | 20 | |
| Kirillsefirov | Base64 | 10 | |
| HashKselR | Favourite byte | 20 | |
| lve_yu | Extended GCD | 20 | |
| Artemlager | Unencryptable | 125 | |
| dkoazwlearning | ProSign 3 | 100 | |
| Artemlager | Ellipse Curve Cryptography | 125 | |
| Artemlager | No Way Back Home | 100 | |
| Artemlager | Broken RSA | 100 | |
| Artemlager | Modular Binomials | 80 | |
| Artemlager | Adrien's Signs | 80 | |
| Artemlager | Successive Powers | 60 | |
| J0kus | You either know, XOR you don't | 30 | |
| Artemlager | Chinese Remainder Theorem | 40 | |
| Artemlager | Modular Square Root | 35 | |
| Artemlager | Legendre Symbol | 35 | |
| Artemlager | Quadratic Residues | 25 | |
| nullex | Modular Inverting | 25 | |
| Artemlager | Oh SNAP | 120 | |
| Artemlager | Dancing Queen | 120 | |
| Artemlager | Stream of Consciousness | 80 | |
| Artemlager | Logon Zero | 80 | |
| Artemlager | CTRIME | 70 | |
| Artemlager | Bean Counter | 60 | |
| Artemlager | Symmetry | 50 | |
| Artemlager | Triple DES | 60 | |
| Artemlager | Lazy CBC | 60 | |
| Artemlager | Flipping Cookie | 60 | |
| Artemlager | ECB Oracle | 60 | |
| spholo | SSH Keys | 35 | |
| Artemlager | ECB CBC WTF | 55 | |
| NP_ar | Bytes and Big Integers | 10 | |
| Artemlager | Passwords as Keys | 50 | |
| Artemlager | Modes of Operation Starter | 15 | |
| Artemlager | Bringing It All Together | 50 | |
| Artemlager | Diffusion through Permutation | 30 | |
| sibAlpha | Favourite byte | 20 | |
| Artemlager | Confusion through Substitution | 25 | |
| Artemlager | Round Keys | 20 |
You are now level Current level