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SSCP · Question #670

SSCP Question #670: Real Exam Question with Answer & Explanation

The correct answer is A: Cross-certification. Cross-certification allows two separate Public Key Infrastructure (PKI) hierarchies to establish mutual trust, enabling users in one hierarchy to validate certificates issued by a different Certification Authority (CA) hierarchy. This is done by having the CAs issue certificates

Submitted by weili_xi· Apr 18, 2026Cryptography

Question

What enables users to validate each other's certificate when they are certified under different certification hierarchies?

Options

  • ACross-certification
  • BMultiple certificates
  • CRedundant certification authorities
  • DRoot certification authorities

Explanation

Cross-certification allows two separate Public Key Infrastructure (PKI) hierarchies to establish mutual trust, enabling users in one hierarchy to validate certificates issued by a different Certification Authority (CA) hierarchy. This is done by having the CAs issue certificates to each other, bridging the trust paths. Multiple certificates and redundant CAs address availability, not cross-hierarchy trust, and root CAs only anchor trust within their own hierarchy.

Topics

#Cross-certification#PKI#Certificate validation#Trust models

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