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window.crypto

The Window.crypto read-only property returns the Crypto object associated to the global object. This object allows web pages access to certain cryptographic related services.

Syntax

var cryptoObj = window.crypto || window.msCrypto; // for IE 11

Example

Using the Window.crypto property to access the getRandomValues() method.

JavaScript

genRandomNumbers = function getRandomNumbers() {
  var array = new Uint32Array(10);
  window.crypto.getRandomValues(array);
 
  var randText = document.getElementById("myRandText");
  randText.innerHTML = "The random numbers are: "
  for (var i = 0; i < array.length; i++) {
    randText.innerHTML += array[i] + " ";
  }
}

HTML

<p id="myRandText">The random numbers are: </p>
<button type="button" onClick='genRandomNumbers()'>Generate 10 random numbers</button>

Result

Specifications

Specification Status Comment
Web Cryptography API
The definition of 'Window.crypto' in that specification.
Recommendation Initial definition

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 37 12 34 11
Prefixed
11
Prefixed
Prefixed Requires the vendor prefix: ms
24 6.1
Mobile
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support 37 37 12 34 24 6.1 Yes

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/window/crypto