yingzhe07
Solves
| Challenge | Category | Value | Time |
| Base64 | Warm Up | 20 | |
| Warm Up | Warm Up | 20 | |
| QR | Warm Up | 20 | |
| Secure Shell | Warm Up | 20 | |
| What is ROT? | Cryptography | 50 | |
| Stegnography 1 | Steganography | 100 | |
| Forensics Warm Up 1 | Forensics | 20 | |
| Patience Test | Warm Up | 300 | |
| Web warmup | Web | 20 | |
| Beginner Reverse 1 | Reverse Engineering | 50 | |
| Simple Overflow | Binary | 20 | |
| Net Cat | Warm Up | 20 | |
| Simple RSA | Cryptography | 20 | |
| Simple RSA 2 | Cryptography | 20 | |
| Simple Diffie-Hellman | None | 20 | |
| Julius Caesar | Cryptography | 100 | |
| I am Samuel Morse! | Cryptography | 100 | |
| I am Samuel Morse 2! | Cryptography | 200 | |
| De Tuna My Fish | Cryptography | 20 | |
| Simple Diffie-Hellman 2 | None | 20 | |
| Year 1993 by Urban Müller | Cryptography | 300 | |
| Small-E | None | 20 | |
| Beware of SHA1rk | Cryptography | 20 | |
| Recette Secrète | Cryptography | 20 | |
| Where is the flag? | Web | 20 |