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 compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support44 Yes Yes11 ms 19 Yes
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support ? Yes Yes Yes Yes Yes ?

See also

Document Tags and Contributors

Last updated by: fscholz,