Public Key Infrastructure, commonly known as PKI, is a security mechanism widely used by organizations to secure digital communication and data transfer. It is a set of hardware, software, policies, and procedures that enable the secure transmission of sensitive information over the Internet. In this article, we will delve deeper into the workings of PKI and its various components, the advantages and drawbacks of using PKI, best practices for implementing and maintaining a secure PKI system, as well as the future of PKI.