extraespresso
Solves
| Challenge | Category | Value | Time |
| Warm Up | Warm Up | 20 | |
| Base64 | Warm Up | 20 | |
| QR | Warm Up | 20 | |
| Net Cat | Warm Up | 20 | |
| Discord | Warm Up | 10 | |
| Beginner Reverse 1 | Reverse Engineering | 50 | |
| Forensics Warm Up 1 | Forensics | 20 | |
| What is ROT? | Cryptography | 50 | |
| Stegnography 1 | Steganography | 100 | |
| Web warmup | Web | 20 | |
| Where is the flag? | Web | 20 | |
| My First SQL | Web | 20 | |
| Schrödinger's Cat | Miscellaneous | 20 | |
| Forensics Warm Up 2 | Forensics | 50 | |
| File Signature | Forensics | 20 | |
| Shark Of Wire | Forensics | 20 | |
| Corrupted Image | Forensics | 20 | |
| Secret Letter | Steganography | 20 | |
| Godam Secrets | Forensics | 20 | |
| Julius Caesar | Cryptography | 100 | |
| Year 1993 by Urban Müller | Cryptography | 300 | |
| I am Samuel Morse! | Cryptography | 100 | |
| Beware of SHA1rk | Cryptography | 20 | |
| I am Samuel Morse 2! | Cryptography | 200 | |
| Simple RSA | Cryptography | 20 | |
| Simple RSA 2 | Cryptography | 20 | |
| E-CryptoBook Service | Cryptography | 20 | |
| Simple Diffie-Hellman | None | 20 | |
| Beginner Reverse 2 | Reverse Engineering | 50 |