[java] PKI (Public Key Infrastructure)

PKI, which stands for Public Key Infrastructure, is a system that is used to manage digital certificates and public-private key pairs. It provides a secure way of exchanging information over insecure networks such as the internet.

What is PKI?

PKI is a set of hardware, software, policies, and standards used to create, manage, and distribute digital certificates, an essential component of secure communication. Digital certificates are used to verify the identity of an entity, for example, a person, a computer, or a website, and to establish a secure communication channel using public key cryptography.

How PKI works

The basic components of a PKI system include:

  1. Certificate Authority (CA): A trusted entity that issues digital certificates.
  2. Registration Authority (RA): The entity responsible for verifying the identity of certificate applicants before passing the information to the CA for certificate issuance.
  3. Certificate Repository: A place where issued certificates, Certificate Revocation Lists (CRLs), and other PKI-related information are stored.
  4. Certificate Management System: Software that manages certificates throughout their lifecycle, from issuance and distribution to renewal and revocation.

Advantages of PKI

Applications of PKI


PKI is a fundamental technology for designing secure networks and ensuring the confidentiality and integrity of data. It plays a crucial role in securing online communication, electronic transactions, and identity management.