Twenty, a cyber warfare startup, raised $100 million and is now valued at $1 billion.Why it matters: Cyber success stories like this are rare, as some investors latch onto things that go boom or can be hauled onto a conference floor.Even rarer is Twenty's unabashed pursuit and advertisement of offensive cyber tools.Driving the news: Twenty announces its Series B on Wednesday. Chief executive Joseph Lin tells Axios the money will be spent on supercharging research and development and the "existin...