TL;DR What is 0xCastle During Eth London, I overheard a group talking about cryptography and heard them mention 0xCASTLE. I was intrigued because the characters “s,t,l” aren’t hex characters. After hacking for a while, I saw a pamphlet in the smoking area describing 0xCastle. It sounded like a conspiracy about a cryptography event. A weird cryptography event taking place after ETH Berlin. After recovering from the hackathon a week later, it popped into my mind again.
