公こう開かいキーMeanings1nounpublic keycomputingIn cryptography, the key that is shared openly and used to encrypt data or verify signatures.公こう開かいキーで暗あん号ごう化かされたデータは、秘ひ密みつキーでしか復ふく号ごうできない。Data encrypted with the public key can only be decrypted with the private key.