| Date | User | Challenge | Score |
| toni_kroos | Great Snakes | 3 | |
| Pigrec0 | Base64 | 10 | |
| 2HUB1 | RSA Decryption | 20 | |
| toni_kroos | Finding Flags | 2 | |
| graphite | Modular Arithmetic 1 | 20 | |
| 2HUB1 | Private Keys | 20 | |
| Pigrec0 | Hex | 5 | |
| graphite | Extended GCD | 20 | |
| 2HUB1 | Euler's Totient | 20 | |
| aisitihalimah | Static Client 2 | 120 | |
| 2HUB1 | Public Keys | 15 | |
| 2HUB1 | Modular Exponentiation | 10 | |
| zafa | Quadratic Residues | 25 | |
| Pigrec0 | ASCII | 5 | |
| Paulasjes | Finding Flags | 2 | |
| Pigrec0 | Great Snakes | 3 | |
| asepepepe | Favourite byte | 20 | |
| graphite | Greatest Common Divisor | 15 | |
| Pigrec0 | Finding Flags | 2 | |
| 2HUB1 | Successive Powers | 60 | |
| nancyaninidtia | Chinese Remainder Theorem | 40 | |
| JGaspar | Great Snakes | 3 | |
| JGaspar | Finding Flags | 2 | |
| TurboThon | Gaussian Reduction | 50 | |
| 2HUB1 | Modes of Operation Starter | 15 | |
| 2HUB1 | Bringing It All Together | 50 | |
| 2HUB1 | Round Keys | 20 | |
| 2HUB1 | Resisting Bruteforce | 10 | |
| POP | ASCII | 5 | |
| 2HUB1 | Keyed Permutations | 5 | |
| TurboThon | What's a Lattice? | 40 | |
| betterbea | Bytes and Big Integers | 10 | |
| 2HUB1 | Network Attacks | 5 | |
| crypto_saka_hack | ECB Oracle | 60 | |
| Hidanchik | Bean Counter | 60 | |
| Hidanchik | Symmetry | 50 | |
| Hidanchik | Flipping Cookie | 60 | |
| Hidanchik | ECB CBC WTF | 55 | |
| Hidanchik | ECB Oracle | 60 | |
| Hidanchik | Passwords as Keys | 50 | |
| Hidanchik | Modes of Operation Starter | 15 | |
| Hidanchik | Bringing It All Together | 50 | |
| Hidanchik | Diffusion through Permutation | 30 | |
| Hidanchik | Confusion through Substitution | 25 | |
| Yexi_ | XOR Starter | 10 | |
| Hidanchik | Round Keys | 20 | |
| Hidanchik | Structure of AES | 15 | |
| Hidanchik | Resisting Bruteforce | 10 | |
| Hidanchik | Keyed Permutations | 5 | |
| Yexi_ | Bytes and Big Integers | 10 |
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