Steve Mould : I Hacked Into My Own Car

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I think one of the really interesting things about this video is that it shows someone taking a basic principle like the replay attack and figuring out how to make it work in the real world. It didn't work at first, and he went through a number of attempts and refinements before it finally did. This is an essential skill because you can't always just follow someone else's instructions, especially when you're dealing with something new and there are no instructions to follow yet.