PKI
acronymcryptographysecuritynetworking
Stands for: Public Key Infrastructure
The system of certificates and authorities that lets strangers trust each other's public keys.
Public Key Infrastructure answers "is this key really theirs" by having trusted Certificate Authorities vouch for keys with signed certificates. It is the chain of trust behind the padlock in your browser, and the machinery that makes TLS usable at internet scale.
Also known as: pki, public key infrastructure, certificate authority, CA