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How to Disable Copy Paste (Browser)

I am trying 2 alternatives:

  • Ignore right-click
  • Ignore ctrl + C, ctrl + A

This is my code:

function noMenu() {
  return false;
}
function disableCopyPaste(elm) {
  // Disable cut/copy/paste key events
  elm.onkeydown = interceptKeys
  // Disable right click events
  elm.oncontextmenu = function() {
    return false
  }
}
function interceptKeys(evt) {
  evt = evt||window.event // IE support
  var c = evt.keyCode
  var ctrlDown = evt.ctrlKey||evt.metaKey // Mac support
  // Check for Alt+Gr (http://en.wikipedia.org/wiki/AltGr_key)
  if (ctrlDown && evt.altKey) return true
  // Check for ctrl+c, v and x
  else if (ctrlDown && c==67) return false // c
  else if (ctrlDown && c==86) return false // v
  else if (ctrlDown && c==88) return false // x
  // Otherwise allow
  return true
}

And this is my HTML:

<body class="node88" oncontextmenu="return noMenu();" onkeydown="return disableCopyPaste();">

The noMenu() function is working, but disableCopyPaste() doesn't work.

Solution

  • You can't.

    You can sort of try to block some vectors (like hacks to make right clicking more difficult, intercepting ctrl+c, making it difficult to select text)… But they will only sort of work, and it's impossible to block all vectors (edit -> copy? view source? wget? etc…).

    If you are trying to protect your content from less technical users, these methods might be okay… But as the comments here suggest, they will frustrate more technical users.

    If you have sensitive content that must be protected, you might want to consider embedding it in a Flash blob or a DRM'd PDF. These are still possible to reverse engineer, but it will take a slightly more intelligent attacker.