| Date | User | Challenge | Score |
| jyppi | Network Attacks | 5 | |
| Yzr | RSA Decryption | 20 | |
| NetCrypt | Base64 | 10 | |
| Cee_bloop | Keyed Permutations | 5 | |
| NetCrypt | Hex | 5 | |
| Dimastra | Base64 | 10 | |
| sefimiu | Parameter Injection | 60 | |
| Dimastra | Hex | 5 | |
| Yzr | Private Keys | 20 | |
| Federico74 | Hex | 5 | |
| Yzr | Euler's Totient | 20 | |
| Yzr | Public Keys | 15 | |
| Yzr | Modular Exponentiation | 10 | |
| Federico74 | ASCII | 5 | |
| Dimastra | ASCII | 5 | |
| jonnytang | Computing Public Values | 25 | |
| Federico74 | Great Snakes | 3 | |
| Dimastra | Great Snakes | 3 | |
| Dimastra | Finding Flags | 2 | |
| Federico74 | Finding Flags | 2 | |
| Duster | Working with Fields | 10 | |
| smugglarn | Symmetry | 50 | |
| Duster | Modulus Inutilis | 50 | |
| Coder | ASCII | 5 | |
| jonnytang | Generators of Groups | 20 | |
| Coder | Great Snakes | 3 | |
| Tabaxi3K | Backpack Cryptography | 120 | |
| Coder | Finding Flags | 2 | |
| Duster | Salty | 20 | |
| luqman30 | Bringing It All Together | 50 | |
| smugglarn | Flipping Cookie | 60 | |
| yihsuan032 | ASCII | 5 | |
| OKlllng | Export-grade | 100 | |
| jonnytang | Square Eyes | 35 | |
| zenapietal | Finding Flags | 2 | |
| UrSourceCode | XOR Starter | 10 | |
| Duster | Manyprime | 40 | |
| huangxiaoyun | Computing Shared Secrets | 30 | |
| cyk0sure | Bean Counter | 60 | |
| huangxiaoyun | Computing Public Values | 25 | |
| huangxiaoyun | Generators of Groups | 20 | |
| smugglarn | ECB CBC WTF | 55 | |
| huangxiaoyun | Working with Fields | 10 | |
| NetCrypt | ASCII | 5 | |
| NetCrypt | Great Snakes | 3 | |
| AndreaMuscarella | No Difference | 175 | |
| yoav_s | Gaussian Reduction | 50 | |
| huangxiaoyun | RSA Decryption | 20 | |
| NetCrypt | Finding Flags | 2 | |
| luqman30 | Diffusion through Permutation | 30 |
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