Google CTF Competition 2018: Cat Chat

Oleg Vaskevich
11 min readJun 25, 2018

This past weekend Google held the qualification round for its third annual Capture the Flag competition, with 25 demanding challenges in categories ranging from cryptography to web to binary exploits. While my skillset goes nowhere near close to that of the talented teams participating from all over the world, I had some time to try my hand at one of the web challenges, Cat Chat, and wanted to document my approach. In my opinion, CTFs can be a great learning experience and taking a stab at some challenges as well as reading people’s write-ups after can be great for becoming a better…

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Oleg Vaskevich

software engineer @coda_hq. formerly @google @kpcbfellows @shapesecurity @twitter