PKI stands for Public Key Infrastructure, which is a framework of encryption and cybersecurity that protects communications between the server and the client. PKI is used to confirm identity by proving ownership of a private key. It is a set of technology and processes required to secure environments with high assurance to control access to systems. PKI is used to manage cryptographic keys that encrypt any communication on web browsers, and it provides assurance that the data sent or received over the internet is secured and helps verify the identity of the party sending this data.

PKI is based on digital certificates that verify the identity of the machines and/or users that ultimately proves the integrity of the transaction. PKI certificates verify the owner of a private key and the authenticity of that relationship going forward to help maintain security. PKI performs encryption directly through the keys that it generates, using two different cryptographic keys: a public key and a private key. Public key encryption is used to encrypt messages, and private key encryption is used to decrypt messages.

PKI is essential in building a trusted and secure business environment by being able to verify and exchange data between various servers and users. It is used to secure documents shared electronically, encrypt email messaging, and safeguard sensitive data transmitted internally or externally. PKI is used to secure online communication and helps mitigate security risks to sensitive data.