5 Stars4 Stars3 Stars2 Stars1 Star (7 votes, average: 5.00 out of 5) What is Extended Key Usage? How do Client Authentication EKU Changes Affect PKI?Last Modified: October 19, 2026 Key Takeaways EKU is an essential X.509 certificate extension used to define what cryptographic purposes can be fulfilled with the public key of a certificate. Recent updates from the CA…
