[!NOTE] CTF CHALLENGE OVERVIEW

• CTF Event: DawgCTF 2026
• Category: Writeup
• Difficulty: [MEDIUM]
• Tools Used: Python 3, Linux CLI
• Author / Writeup: LIGHT

Points: 100

Flag: DawgCTF{SIMPLEX900_95MM}

Description: I saw this weird lock at the escape room I work at. Can you figure out what series it is, and how tall the lock body is?

I started with a reverse image search on the lock. That was enough to identify the series as Simplex 900.

After that, a normal image search for simplex 900 brought up technical details for the same model, including its height.

That gave the full answer as SIMPLEX900_95MM.