公こう開かい鍵かぎ基き盤ばん

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Meanings

1

noun

Public Key Infrastructure; PKI

computing

Technical computing term for the framework that manages digital certificates and public-key encryption.

公こう開かい鍵かぎ
公開鍵 (public key) is a single cryptographic key, while 公開鍵基盤 is the entire infrastructure that manages such keys and certificates.
電でん子し証しょう明めい書しょ
電子証明書 (digital certificate) is a component used within a PKI; 公開鍵基盤 is the broader system.

Compound of 公開鍵 (public key) and 基盤 (infrastructure), a direct translation of the English term 'Public Key Infrastructure'.