| Date | User | Challenge | Score |
| Hellolol | Great Snakes | 3 | |
| Holfelder | Modes of Operation Starter | 15 | |
| touqeer | ASCII | 5 | |
| Hellolol | Finding Flags | 2 | |
| Wistian | Modular Square Root | 35 | |
| li_wei | Keyed Permutations | 5 | |
| touqeer | Great Snakes | 3 | |
| touqeer | Finding Flags | 2 | |
| tide_rising | Bytes and Big Integers | 10 | |
| XIAOZAHNG | You either know, XOR you don't | 30 | |
| Anti_ | No Way Back Home | 100 | |
| amconfused12 | Base64 | 10 | |
| Mr7F | Bad Temper | 130 | |
| Anti_ | Common Ground | 75 | |
| XIAOZAHNG | Favourite byte | 20 | |
| SleepyBanana | Cipher Mode Picker (HKCERT CTF) | 0 | |
| Holfelder | Bringing It All Together | 50 | |
| r3mmi_y | RSA Decryption | 20 | |
| tide_rising | Base64 | 10 | |
| XIAOZAHNG | XOR Properties | 15 | |
| Wistian | Legendre Symbol | 35 | |
| Rahul_Kumar | Export-grade | 100 | |
| tide_rising | Hex | 5 | |
| n7867564 | Confusion through Substitution | 25 | |
| hesijab | Hex | 5 | |
| Too | Favourite byte | 20 | |
| Rahul_Kumar | Modular Binomials | 80 | |
| r3mmi_y | Private Keys | 20 | |
| amconfused12 | Hex | 5 | |
| skimmer | Point Addition | 30 | |
| hesijab | ASCII | 5 | |
| r3mmi_y | Euler's Totient | 20 | |
| hesijab | Great Snakes | 3 | |
| LUCIFERLAMO | Base64 | 10 | |
| r3mmi_y | Public Keys | 15 | |
| Too | XOR Properties | 15 | |
| yaaaaaaaaaaaaaah | Bytes and Big Integers | 10 | |
| hesijab | Finding Flags | 2 | |
| r3mmi_y | Modular Exponentiation | 10 | |
| danonino22 | ASCII | 5 | |
| amconfused12 | ASCII | 5 | |
| zesk | Diffusion through Permutation | 30 | |
| danonino22 | Network Attacks | 5 | |
| XIAOZAHNG | XOR Starter | 10 | |
| danonino22 | Great Snakes | 3 | |
| danonino22 | Finding Flags | 2 | |
| Abhas | XOR Starter | 10 | |
| XIAOZAHNG | Bytes and Big Integers | 10 | |
| amconfused12 | Great Snakes | 3 | |
| Shadow_0131 | Base64 | 10 |
You are now level Current level