concept

Public Key Infrastructure

Public Key Infrastructure (PKI) is a framework of technologies, policies, and procedures that enables secure electronic communication by managing digital certificates and public-key encryption. It establishes trust in digital identities through a hierarchical system of Certificate Authorities (CAs) that issue, validate, and revoke certificates. PKI is fundamental for authentication, encryption, and digital signatures in applications like secure websites, email, and code signing.

Also known as: PKI, Public Key Infrastructure System, Digital Certificate Infrastructure, Certificate Authority Framework, Public Key Cryptography Infrastructure

🧊Why learn Public Key Infrastructure?

Developers should learn PKI when building systems requiring secure authentication, data encryption, or integrity verification, such as web applications with HTTPS, VPNs, or secure APIs. It's essential for implementing SSL/TLS protocols, securing IoT devices, and ensuring compliance with regulations like GDPR or HIPAA that mandate data protection. Understanding PKI helps in troubleshooting certificate errors, configuring secure servers, and designing systems that prevent man-in-the-middle attacks.