noun
Computing term for the non-secret key in asymmetric cryptography, used for encryption or signature verification.
公開かぎでデータを暗号化する。
Encrypt data with the public key.
サーバーの公開かぎを取得し
Please obtain the server's public key.
秘密鍵 is the private key kept secret, while 公開かぎ is the public key shared openly.
Compound of 公開 (こうかい, 'public') and 鍵 (かぎ, 'key'), a direct translation of the English term 'public key'.