| Date | User | Challenge | Score |
| ntdung254 | Passwords as Keys | 50 | |
| Keerthan_V | Great Snakes | 3 | |
| phamgiatri | ZKP Introduction | 5 | |
| CWilhorn | ASCII | 5 | |
| admelix | Favourite byte | 20 | |
| SiZV200 | XOR Starter | 10 | |
| ntdung254 | Modes of Operation Starter | 15 | |
| CWilhorn | Great Snakes | 3 | |
| CWilhorn | Finding Flags | 2 | |
| SiZV200 | Bytes and Big Integers | 10 | |
| SiZV200 | Base64 | 10 | |
| CH7N | You either know, XOR you don't | 30 | |
| SiZV200 | Hex | 5 | |
| SiZV200 | ASCII | 5 | |
| dipychin | Finding Flags | 2 | |
| ntdung254 | Bringing It All Together | 50 | |
| pgdj | Signing Server | 60 | |
| pgdj | Let's Decrypt | 80 | |
| pgdj | Blinding Light | 120 | |
| 303945 | Modulus Inutilis | 50 | |
| SiZV200 | Great Snakes | 3 | |
| 303945 | Salty | 20 | |
| 303945 | Square Eyes | 35 | |
| 303945 | Monoprime | 30 | |
| 303945 | Manyprime | 40 | |
| 303945 | Inferius Prime | 30 | |
| SiZV200 | Finding Flags | 2 | |
| 303945 | Factoring | 15 | |
| 303945 | RSA Signatures | 25 | |
| 303945 | RSA Decryption | 20 | |
| pgdj | Fast Primes | 75 | |
| 303945 | Public Keys | 15 | |
| pgdj | Marin's Secrets | 50 | |
| 303945 | Private Keys | 20 | |
| 303945 | Modular Exponentiation | 10 | |
| pgdj | Infinite Descent | 50 | |
| 303945 | Euler's Totient | 20 | |
| CH7N | Favourite byte | 20 | |
| admelix | Network Attacks | 5 | |
| pgdj | Everything is Still Big | 100 | |
| pgdj | Crossed Wires | 100 | |
| pgdj | Everything is Big | 70 | |
| pgdj | Modulus Inutilis | 50 | |
| pgdj | Salty | 20 | |
| Honey0404 | Finding Flags | 2 | |
| pgdj | Manyprime | 40 | |
| pgdj | Square Eyes | 35 | |
| pgdj | Monoprime | 30 | |
| pgdj | Inferius Prime | 30 | |
| pgdj | Factoring | 15 |
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