秘ひ密みつ鍵かぎMeaningsNoun1. private key (cryptography); secret keyOther spellings秘ひ密みつかぎUsage share unknownKanji used秘secret密intimate鍵keyComposed of秘ひ密みつsecret; secrecy; confidentiality; privacy; mystery; secret (e.g. to success); esoteric teachingsNoun鍵かぎkey; lock; key (to a problem, success, etc.); clueNoun