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ISC2 Systems Security Certified Practitioner (SSCP) Practice Question

Your organization operates an internal PKI that issues client TLS certificates to hundreds of microservices hosted on Amazon EC2 instances. Yesterday a private key was reported stolen, and security wants all services to refuse that certificate within minutes while adding as little overhead as possible to new TLS handshakes. Which PKI control best meets these requirements?

  • Deploy an OCSP responder and enable OCSP stapling on all servers so each TLS handshake carries a signed revocation status.

  • Publish an updated full certificate revocation list (CRL) and configure every server to download it every 24 hours.

  • Place the compromised certificate on the CA's hold list to suspend it until it expires naturally.

  • Reduce the certificate validity period from two years to seven days and re-issue all client certificates.

ISC2 Systems Security Certified Practitioner (SSCP)
Cryptography
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