There are a wide range of technologies that have been developed to secure core Internet infrastructure, however not all of them have yet been widely deployed to reap their benefits. In this presentation we present a selection of these technologies, investigate what security properties they will provide given sufficient adoption, and look at the current deployment status. Specifically we focus on three core areas: interdomain routing, Public Key Infrastructure, and the Domain Name System. In interdomain routing we look at mechanisms to validate routing control protocol messages (Resource Public Key Infrastructure, and Border Gateway Protocol Security), in PKI we focus on the Certificate Authority ecosystem and Certificate Transparency, and for DNS security we look at DNSSEC, and DNS over HTTPS.