Certificate Extension

Key Usage

SMI Security for PKIX Extended Key Purpose

RFC 9809 X.509 Certificate Extended Key Usage (EKU) for Configuration, Updates, and Safety-Critical Communication

Key Attestation Extension for Certificate Management Protocols

EE Cert Key Usage

• X509v3 Key Usage: critical

Digital Signature, Non Repudiation, Key Encipherment, Data Encipherment, Key Agreement

• X509v3 Extended Key Usage:

TLS Web Server Authentication, TLS Web Client Authentication