| Date | User | Challenge | Score |
| rezu | You either know, XOR you don't | 30 | |
| Pet_air | Bytes and Big Integers | 10 | |
| AZZ912 | Successive Powers | 60 | |
| Oswald | Key Backup Service 1 (HKCERT CTF) | 0 | |
| reki38 | Modular Arithmetic 1 | 20 | |
| Oswald | Cipher Mode Picker (HKCERT CTF) | 0 | |
| Oswald | Chaos (Zh3r0 CTF V2) | 0 | |
| bxll | Base64 | 10 | |
| AZZ912 | The Good, The Pad, The Ugly | 100 | |
| Oswald | 1n_jection (Zh3r0 CTF V2) | 0 | |
| APTashraf2026 | Deriving Symmetric Keys | 40 | |
| Oswald | 1337crypt v2 (DownUnderCTF) | 0 | |
| APTashraf2026 | Computing Shared Secrets | 30 | |
| srishticode | ZKP Introduction | 5 | |
| Pet_air | Base64 | 10 | |
| Mualani | Resisting Bruteforce | 10 | |
| APTashraf2026 | Modulus Inutilis | 50 | |
| xsudo | Base64 | 10 | |
| Oswald | Sign in Please (HKCERT CTF) | 0 | |
| srishticode | Network Attacks | 5 | |
| zaidstudent4455 | SSH Keys | 35 | |
| Oswald | 2020 (TETCTF) | 0 | |
| zaidstudent4455 | Privacy-Enhanced Mail? | 25 | |
| xsudo | Hex | 5 | |
| anhsaoleloi | Passwords as Keys | 50 | |
| Oswald | 1337crypt (DownUnderCTF) | 0 | |
| APTashraf2026 | Salty | 20 | |
| Pet_air | Hex | 5 | |
| DingoRad | Modular Arithmetic 1 | 20 | |
| Mualani | Keyed Permutations | 5 | |
| Pet_air | ASCII | 5 | |
| Pet_air | Great Snakes | 3 | |
| Pet_air | Finding Flags | 2 | |
| joeliousCaesar | Chinese Remainder Theorem | 40 | |
| rezu | Favourite byte | 20 | |
| srishticode | Great Snakes | 3 | |
| AZZ912 | Pad Thai | 80 | |
| noncanonical | Chinese Remainder Theorem | 40 | |
| 3662_2C2026_G8 | SSH Keys | 35 | |
| srishticode | Finding Flags | 2 | |
| 3662_2C2026_G8 | CERTainly not | 30 | |
| sharadyadav | Deriving Symmetric Keys | 40 | |
| sharadyadav | Computing Shared Secrets | 30 | |
| sharadyadav | Computing Public Values | 25 | |
| AZZ912 | Oh SNAP | 120 | |
| sharadyadav | Generators of Groups | 20 | |
| rezu | XOR Properties | 15 | |
| sharadyadav | Working with Fields | 10 | |
| Yicarmueer | Modular Inverting | 25 | |
| Mohammedosam | Forbidden Fruit | 150 |
You are now level Current level