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Public Key Infrastructure (PKI)

A framework using encryption keys for secure communications and digital signatures.

Understanding PKI


PKI is based on asymmetric encryption, using a pair of cryptographic keys:

  • Public Key – Used to encrypt data and verify digital signatures.

  • Private Key – Kept secret and used to decrypt data or create digital signatures.

Components of PKI


  1. Certificate Authority (CA) – Issues and manages digital certificates.

  2. Registration Authority (RA) – Verifies identities before certificate issuance.

  3. Digital Certificates – Used for authentication and encryption.

  4. Certificate Revocation List (CRL) – Lists revoked or expired certificates.

  5. Public and Private Keys – Essential for secure encryption and authentication.

Conclusion


PKI is a fundamental security framework that ensures confidentiality, authentication, and integrity in digital interactions. Organizations rely on PKI to protect sensitive data, secure communications, and authenticate users, making it an essential component of modern cybersecurity strategies.

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