PKI secures digital interactions by encrypting information and verifying identities, essential for things like secure websites (SSL/TLS), email encryption, and digital signatures.
Public Key Infrastructure (PKI) is a system that uses a pair of cryptographic keys (public and private) and digital certificates to secure communications. It involves Certificate Authorities (CAs) that verify identities and issue certificates. PKI ensures data encryption, authentication, and integrity for secure transactions over networks.