The PKI is a bundle of technologies, policies, and processes that facilitate the deployment of public-key cryptography in a network. The main purpose of a PKI is to ensure that all communication that takes place over a network (between a server and a client) is private and encrypted. It provides a framework for the implementation of data security techniques like encryption and digital signatures, and employs digital certificates to check the validity of various network endpoints. A digital certificate binds the public key to the entity it’s destined for, like a website or a service, and is a proof of an entity’s authenticity.