PKI (EN)

Architecture

flowchart TD     A[CA - Certificate Authority] --> B[RA - Registration Authority]     B --> C[End Entity]     A --> D[CRL - Certificate Revocation List]     A --> E[OCSP - Online Certificate Status Protocol]     C --> F[Digital Certificate]     F --> G[Public/Private Key Pair]     G --> H[Authentication]     H --> I[Encryption]     H --> J[Digital Signatures] 

In Context

• Typically used together with VPN technologies such as OpenVPN, IPsec, or SSL/TLS
• Related to: X.509, digital certificates, asymmetric encryption
• Example use: Secure communication in e-commerce, corporate VPN, digital identity verification