Un document qui se lit librement et demande à ne pas être copié

Une page qui s'ouvre sans qu'on tape quoi que ce soit et qui s'imprime comme n'importe quelle autre, et qui demande au logiciel de lecture de laisser son texte où il est. Chaque mot en est brouillé à l'intérieur du fichier.

Cette page est le programme entier, pour celui qui écrit vos logiciels. Il n'y a rien d'autre à y lire. Revenir au document qu'il écrit.

JSON write_restricted.json 295 lignes

Celui-ci n'est pas un programme. C'est la requête envoyée au serveur de documents : la même page, demandée par le réseau, par une application qui n'écrit pas une ligne de code PDF.

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{
  "metadata": {
    "title": "A document that reads freely and asks not to be copied"
  },
  "protection": {
    "owner_password": "the owner",
    "permissions": [
      "printing",
      "printing_at_full_resolution",
      "extracting_for_accessibility"
    ]
  },
  "items": [
    {
      "type": "text",
      "rect": {
        "llx": 72.0,
        "lly": 760.0,
        "urx": 540.0,
        "ury": 781.6
      },
      "content": [
        "A document that reads freely"
      ],
      "font": "DejaVuSans",
      "font_size": 18.0
    },
    {
      "type": "text",
      "rect": {
        "llx": 72.0,
        "lly": 738.0,
        "urx": 540.0,
        "ury": 759.6
      },
      "content": [
        "and asks not to be copied"
      ],
      "font": "DejaVuSans",
      "font_size": 18.0
    },
    {
      "type": "text",
      "rect": {
        "llx": 72.0,
        "lly": 700.0,
        "urx": 540.0,
        "ury": 713.2
      },
      "content": [
        "Everything written in this file is scrambled: every word,"
      ],
      "font": "DejaVuSans",
      "font_size": 11.0
    },
    {
      "type": "text",
      "rect": {
        "llx": 72.0,
        "lly": 682.0,
        "urx": 540.0,
        "ury": 695.2
      },
      "content": [
        "every picture, under a key of two hundred and fifty-six bits."
      ],
      "font": "DejaVuSans",
      "font_size": 11.0
    },
    {
      "type": "text",
      "rect": {
        "llx": 72.0,
        "lly": 664.0,
        "urx": 540.0,
        "ury": 677.2
      },
      "content": [
        "It opens all the same. Nobody is asked for anything, which is"
      ],
      "font": "DejaVuSans",
      "font_size": 11.0
    },
    {
      "type": "text",
      "rect": {
        "llx": 72.0,
        "lly": 646.0,
        "urx": 540.0,
        "ury": 659.2
      },
      "content": [
        "what most protected files in the world do."
      ],
      "font": "DejaVuSans",
      "font_size": 11.0
    },
    {
      "type": "text",
      "rect": {
        "llx": 72.0,
        "lly": 628.0,
        "urx": 540.0,
        "ury": 641.2
      },
      "content": [
        "What it asks is asked of the reading software: let this be"
      ],
      "font": "DejaVuSans",
      "font_size": 11.0
    },
    {
      "type": "text",
      "rect": {
        "llx": 72.0,
        "lly": 610.0,
        "urx": 540.0,
        "ury": 623.2
      },
      "content": [
        "printed and read out loud, but do not let it be copied or"
      ],
      "font": "DejaVuSans",
      "font_size": 11.0
    },
    {
      "type": "text",
      "rect": {
        "llx": 72.0,
        "lly": 592.0,
        "urx": 540.0,
        "ury": 605.2
      },
      "content": [
        "changed. It is a request and not a lock, and software that"
      ],
      "font": "DejaVuSans",
      "font_size": 11.0
    },
    {
      "type": "text",
      "rect": {
        "llx": 72.0,
        "lly": 574.0,
        "urx": 540.0,
        "ury": 587.2
      },
      "content": [
        "pays no heed to it copies the page all the same."
      ],
      "font": "DejaVuSans",
      "font_size": 11.0
    },
    {
      "type": "text",
      "rect": {
        "llx": 72.0,
        "lly": 556.0,
        "urx": 540.0,
        "ury": 569.2
      },
      "content": [
        "The author's password lifts the request: the owner"
      ],
      "font": "DejaVuSans",
      "font_size": 11.0
    },
    {
      "type": "text",
      "rect": {
        "llx": 72.0,
        "lly": 520.0,
        "urx": 540.0,
        "ury": 535.6
      },
      "content": [
        "The other document of this pair"
      ],
      "font": "DejaVuSans",
      "font_size": 13.0
    },
    {
      "type": "text",
      "rect": {
        "llx": 72.0,
        "lly": 492.0,
        "urx": 540.0,
        "ury": 505.2
      },
      "content": [
        "A second document was written beside this one. That one shows"
      ],
      "font": "DejaVuSans",
      "font_size": 11.0
    },
    {
      "type": "text",
      "rect": {
        "llx": 72.0,
        "lly": 474.0,
        "urx": 540.0,
        "ury": 487.2
      },
      "content": [
        "nothing at all until its password is typed in, while the page"
      ],
      "font": "DejaVuSans",
      "font_size": 11.0
    },
    {
      "type": "text",
      "rect": {
        "llx": 72.0,
        "lly": 456.0,
        "urx": 540.0,
        "ury": 469.2
      },
      "content": [
        "you are reading opened on its own."
      ],
      "font": "DejaVuSans",
      "font_size": 11.0
    },
    {
      "type": "text",
      "rect": {
        "llx": 72.0,
        "lly": 420.0,
        "urx": 540.0,
        "ury": 435.6
      },
      "content": [
        "Where the key comes from"
      ],
      "font": "DejaVuSans",
      "font_size": 13.0
    },
    {
      "type": "text",
      "rect": {
        "llx": 72.0,
        "lly": 392.0,
        "urx": 540.0,
        "ury": 405.2
      },
      "content": [
        "The thirty-two bytes the key is built from are fixed in this"
      ],
      "font": "DejaVuSans",
      "font_size": 11.0
    },
    {
      "type": "text",
      "rect": {
        "llx": 72.0,
        "lly": 374.0,
        "urx": 540.0,
        "ury": 387.2
      },
      "content": [
        "example, so that it writes the same file on every run and one"
      ],
      "font": "DejaVuSans",
      "font_size": 11.0
    },
    {
      "type": "text",
      "rect": {
        "llx": 72.0,
        "lly": 356.0,
        "urx": 540.0,
        "ury": 369.2
      },
      "content": [
        "build can be compared with the last. A program takes them from"
      ],
      "font": "DejaVuSans",
      "font_size": 11.0
    },
    {
      "type": "text",
      "rect": {
        "llx": 72.0,
        "lly": 338.0,
        "urx": 540.0,
        "ury": 351.2
      },
      "content": [
        "its operating system: a seed anybody can read locks nothing."
      ],
      "font": "DejaVuSans",
      "font_size": 11.0
    }
  ]
}