What is the purpose of a Public Key Infrastructure (PKI)?

The purpose of a Public Key Infrastructure (PKI) is to manage digital certificates and public-key encryption. PKI provides a framework that enables secure communication and authentication through the management of public-key cryptography, which includes issuing, renewing, and revoking digital certificates. These digital certificates are essential for establishing trust between parties in a digital environment, validating the identity of users and devices, and providing encryption for secure transactions.

In this framework, public keys can be distributed widely, while private keys remain confidential to the owner. This system allows parties to securely exchange information without needing to share their private keys, thus facilitating secure communications over unsecured channels. By managing these certificates, PKI plays a critical role in securing various applications, including secure web browsing (SSL/TLS), email encryption, and authentication processes.

Other options reflect specific functions that may utilize encryption or security, but they do not encapsulate the overarching role of PKI. For instance, while facilitating data encryption for emails pertains to one application of public-key cryptography, it does not cover the broader management aspect of a PKI system. Similarly, configuring network routers and securely storing user passwords fall outside the defining characteristics and functions of a PKI, showcasing the comprehensive nature of PKI in enabling secure digital