"秘密鍵" meaning in Japanese

{
  "forms": [
    {
      "form": "秘密鍵",
      "ruby": [
        [
          "秘密鍵",
          "ひみつかぎ"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "himitsukagi",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ひみつかぎ"
      },
      "expansion": "秘密鍵(ひみつかぎ) • (himitsukagi)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "ja",
          "name": "Cryptography",
          "orig": "ja:Cryptography",
          "parents": [
            "Computer science",
            "Formal sciences",
            "Mathematics",
            "Computing",
            "Sciences",
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "secret key"
      ],
      "id": "en-秘密鍵-ja-noun-ZoWbet5O",
      "links": [
        [
          "cryptography",
          "cryptography"
        ],
        [
          "secret",
          "secret"
        ],
        [
          "key",
          "key"
        ]
      ],
      "raw_glosses": [
        "(cryptography) secret key"
      ],
      "related": [
        {
          "english": "public key",
          "roman": "kōkaikagi",
          "ruby": [
            [
              "公開鍵",
              "こうかいかぎ"
            ]
          ],
          "word": "公開鍵"
        }
      ],
      "topics": [
        "computing",
        "cryptography",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ]
    }
  ],
  "word": "秘密鍵"
}

{
  "forms": [
    {
      "form": "秘密鍵",
      "ruby": [
        [
          "秘密鍵",
          "ひみつかぎ"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "himitsukagi",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ひみつかぎ"
      },
      "expansion": "秘密鍵(ひみつかぎ) • (himitsukagi)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "related": [
    {
      "english": "public key",
      "roman": "kōkaikagi",
      "ruby": [
        [
          "公開鍵",
          "こうかいかぎ"
        ]
      ],
      "word": "公開鍵"
    }
  ],
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese lemmas",
        "Japanese links with redundant wikilinks",
        "Japanese nouns",
        "Japanese terms spelled with secondary school kanji",
        "Japanese terms spelled with sixth grade kanji",
        "Japanese terms with non-redundant non-automated sortkeys",
        "Japanese terms with redundant sortkeys",
        "Japanese terms written with three Han script characters",
        "ja:Cryptography"
      ],
      "glosses": [
        "secret key"
      ],
      "links": [
        [
          "cryptography",
          "cryptography"
        ],
        [
          "secret",
          "secret"
        ],
        [
          "key",
          "key"
        ]
      ],
      "raw_glosses": [
        "(cryptography) secret key"
      ],
      "topics": [
        "computing",
        "cryptography",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ]
    }
  ],
  "word": "秘密鍵"
}

{
  "called_from": "parser/1336",
  "msg": "no corresponding start tag found for </span>",
  "path": [
    "秘密鍵"
  ],
  "section": "Japanese",
  "subsection": "noun",
  "title": "秘密鍵",
  "trace": ""
}