公こう開かい鍵かぎMeaningsNoun1. public keyKanji used公public開open鍵keyComposed of公こう開かいopening to the public; making available to the public; exhibiting; unveiling; release (of a film, information, etc.); disclosure; publicationNoun鍵かぎkey; lock; key (to a problem, success, etc.); clueNoun