A certificate signing request (CSR) is part of the SSL/TLS certificate process and contains information that the Certificate Authority needs, including common name, country, and organization.

Public key cryptography, also called asymmetric cryptography, uses a public key and private key for encrypting communications transmitted across the internet.

Secure Sockets Layer (SSL) is an encryption security protocol that improves privacy, authentication, and integrity for data communications sent over the internet. It evolved into Transport Layer Security (TLS).