Internet pioneer David Clark said: “It’s not that we didn’t think about security. We knew that there were untrustworthy people out there, and we thought we could exclude them.” Those who created the internet were focused on enabling the utility of the network, and a repercussion of their design decisions is that internet security is not inherent but must be retrofitted. Efforts to change one of the internet’s hardwired insecurities—the Domain Name System (DNS)—are ongoing but will be disruptive.