John Graham-Cumming doesn’t ping me often, but when he does I pay attention. His day job is the CTO of the security giant Cloudflare, but he is also a lay historian of technology, guided by a righteous compass. He might be best known for successfully leading a campaign to force the UK government to apologize to the legendary computer scientist Alan Turing for prosecuting him for homosexuality and essentially harassing him to death. So when he DM’d me to say that he had “a hell of a story”—promising “one-time pads!…
