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ISC2 SSCP Oct 2025 outline · Domain 5: Cryptography

PKI: CAs, certificates, CSRs, chain of trust, CRL and OCSP

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Last reviewed September 25, 2026 · Leer en español

Public key cryptography has one big question: how do you know a public key really belongs to the person or server that claims it? Public key infrastructure (PKI) answers that with trusted third parties, digital certificates and processes for issuing and revoking them. PKI includes the people, policies, hardware and software that manage certificates through their lifecycle.

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