the cr0wn

The UK’s Top Competitive Cyber Security Team

  1. PlaidCTF 2019: Triggered (web)

    For this challenge we have an utter atrocity against mankind, a webserver written entirely in SQL. …


  2. VincCTF 2018

    This was a very enjoyable cryptography-only CTF. It explored common implementation errors in modern cryptosystems, with a focus on elliptic curve signatures, broken combination ciphers, and cryptocurrencies. …


  3. SECCON 2018: Ghostkingdom (web)

    This is a writeup of the Ghostkingdom web challenge from SECCON 2018 Online CTF. …