OTTAWA—When former CIA computer specialist Edward Snowden leaked classified information in 2013 revealing the United States National Security Agency and other government agencies were using global surveillance programs to spy on internet users, Fen Olser Hampson and Eric Jardine started thinking about how a worldwide lack of trust could destroy the internet. So they wrote a book about it, Look Who’s Watching: Surveillance, Treachery, and Trust Online, published by the Centre for International Governance Innovation.