秘ひ鑰やく

noun

secret key; private key

Rare, literary, or technical term for a cryptographic or metaphorical secret key. In modern contexts, 秘密鍵 (ひみつかぎ) is more common.

• この暗あん号ごう文ぶんを解とくには、正ただしい秘ひ鑰やくが必ひつ要ようだ。

  To decipher this coded message, the correct secret key is needed.