Which term refers to a framework of certificate authorities, digital certificates, software, services, and other cryptographic components used to validate subject identities?

Which term refers to a framework of certificate authorities, digital certificates, software, services, and other cryptographic components used to validate subject identities?

• A. Digital certificates
• B. Certificate Authority
• C. Public Key Infrastructure (PKI)
• D. Public Key Cryptography Standards (PKCS)

Answer: (C)

Public Key Infrastructure is the framework that binds identities to public keys and enables trust in digital communications. It brings together certificate authorities, registration authorities, certificate databases and stores, and the software and services that issue, manage, validate, and revoke digital certificates. The certificates themselves carry a subject’s public key and identity and are signed by a trusted CA, allowing others to verify the authenticity of the holder and establish encrypted communication, data integrity, and non-repudiation. Trust in PKI rests on a hierarchy of trusted roots and intermediate authorities; when a certificate is presented, validators check the chain up to a root that is trusted and confirm that the certificate hasn’t been revoked. A digital certificate is an element within PKI—a credential that binds a public key to an identity. A certificate authority is the issuer and trusted anchor, not the whole framework. PKCS, on the other hand, refers to specific cryptographic data formats and standards, not the complete system for validating identities.

Public Key Infrastructure is the framework that binds identities to public keys and enables trust in digital communications. It brings together certificate authorities, registration authorities, certificate databases and stores, and the software and services that issue, manage, validate, and revoke digital certificates. The certificates themselves carry a subject’s public key and identity and are signed by a trusted CA, allowing others to verify the authenticity of the holder and establish encrypted communication, data integrity, and non-repudiation. Trust in PKI rests on a hierarchy of trusted roots and intermediate authorities; when a certificate is presented, validators check the chain up to a root that is trusted and confirm that the certificate hasn’t been revoked. A digital certificate is an element within PKI—a credential that binds a public key to an identity. A certificate authority is the issuer and trusted anchor, not the whole framework. PKCS, on the other hand, refers to specific cryptographic data formats and standards, not the complete system for validating identities.