‘The internet is broken,’ a corporate chieftain told me last week. It was an arresting remark, but he did not mean that his home Wi-Fi hub had gone down and required a jab with a paperclip, as mine frequently does. He meant that the entire web has become so insecure — so plagued by industrial-scale scammers, viral anarchists and, according to the US Department of Justice, Chinese military hackers — that it can no longer be trusted for any form of confidential data transmission, from online payments to state secrets.