{
  "id": "museum-columnar-classroom-v1",
  "version": 1,
  "provenance": "Original synthetic classroom messages. The short complete fixture is independently hand-checkable as rows ATTA / CKAT / DAWN, reading columns 3,1,4,2. Orders in this JSON are zero-based ciphertext readout orders. No historical provenance or population representativeness is claimed.",
  "seeds": [
    7,
    19,
    41
  ],
  "budget": 1000,
  "restarts": 2,
  "fixtures": [
    {
      "id": "short-complete",
      "plaintext": "ATTACKATDAWN",
      "ciphertext": "TAWACDATNTKA",
      "order": [
        2,
        0,
        3,
        1
      ],
      "width": 4,
      "length": 12,
      "remainder": 0
    },
    {
      "id": "courier-incomplete",
      "plaintext": "THECOURIERLEFTTHEMESSAGEBESIDETHEBRIDGE",
      "ciphertext": "CETEEDBEHREEASHDORTSBERTULHSETIEIFMGIEG",
      "order": [
        3,
        1,
        4,
        0,
        2
      ],
      "width": 5,
      "length": 39,
      "remainder": 4
    },
    {
      "id": "reading-complete",
      "plaintext": "THEMUSEUMKEEPSORIGINALMESSAGESANDASKSVISITORSTOCOMPAREEVIDENCEBEFOREACCEPTINGANA",
      "ciphertext": "EOMAIOEBCNEEIASOPERITMISDIOIFPURENSCVEEAMENGKRANENSSLSVTEECAHKGSATMDOTUPAESSRCAG",
      "order": [
        6,
        2,
        0,
        7,
        3,
        5,
        1,
        4
      ],
      "width": 8,
      "length": 80,
      "remainder": 0
    },
    {
      "id": "long-key-incomplete",
      "plaintext": "WEWILLREADTHEORIGINALMESSAGECAREFULLYANDRECORDTHEKEYANDTHESOURCEBEFOREMAKINGANYCLAIMABOUTS",
      "ciphertext": "DMUDEEAWRGNECNOEAEOTOCWESYEUKAHSLHOAMLIAENENSIIEDYEGUTELTSMIEOAAKRIBALFRHRLLGCRABATRNRCDFY",
      "order": [
        9,
        2,
        7,
        0,
        11,
        5,
        3,
        10,
        1,
        8,
        4,
        6
      ],
      "width": 12,
      "length": 90,
      "remainder": 6
    }
  ]
}