"Playfair cipher" meaning in All languages combined

{
  "etymology_text": "Named after Lord Playfair, who promoted it. (It was invented in 1854 by Charles Wheatstone.)",
  "forms": [
    {
      "form": "Playfair ciphers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Playfair cipher (plural Playfair ciphers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A manual symmetric encryption technique that encrypts pairs of letters (digraphs)."
      ],
      "id": "en-Playfair_cipher-en-noun-7XTpkL3R",
      "links": [
        [
          "manual",
          "manual"
        ],
        [
          "symmetric",
          "symmetric"
        ],
        [
          "encryption",
          "encryption"
        ],
        [
          "technique",
          "technique"
        ],
        [
          "encrypt",
          "encrypt"
        ],
        [
          "digraph",
          "digraph"
        ]
      ],
      "wikipedia": [
        "Charles Wheatstone",
        "Lord Playfair",
        "Playfair cipher"
      ]
    }
  ],
  "word": "Playfair cipher"
}

{
  "etymology_text": "Named after Lord Playfair, who promoted it. (It was invented in 1854 by Charles Wheatstone.)",
  "forms": [
    {
      "form": "Playfair ciphers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Playfair cipher (plural Playfair ciphers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys"
      ],
      "glosses": [
        "A manual symmetric encryption technique that encrypts pairs of letters (digraphs)."
      ],
      "links": [
        [
          "manual",
          "manual"
        ],
        [
          "symmetric",
          "symmetric"
        ],
        [
          "encryption",
          "encryption"
        ],
        [
          "technique",
          "technique"
        ],
        [
          "encrypt",
          "encrypt"
        ],
        [
          "digraph",
          "digraph"
        ]
      ],
      "wikipedia": [
        "Charles Wheatstone",
        "Lord Playfair",
        "Playfair cipher"
      ]
    }
  ],
  "word": "Playfair cipher"
}