---
title: Window.crypto
slug: Web/API/Window/crypto
translation_of: Web/API/Window/crypto
---
<div>{{APIRef}}</div>

<p>Window.crypto只读属性返回与全局对象关联的 {{domxref("Crypto")}}对象。 此对象允许网页访问某些加密相关服务。</p>

<h2 id="语法">语法</h2>

<pre class="syntaxbox">var <em>cryptoObj</em> = window.crypto || window.msCrypto; // for IE 11
</pre>

<h2 id="Example" name="Example">范例</h2>

<h4 id="使用_domxref(Window.crypto)_来访问getRandomValues()_方法.">使用 {{domxref("Window.crypto")}} 来访问<a href="/en-US/docs/Web/API/RandomSource/getRandomValues">getRandomValues()</a> 方法.</h4>

<h3 id="JavaScript">JavaScript</h3>

<pre class="brush: js">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 &lt; array.length; i++) {
    randText.innerHTML += array[i] + " ";
  }
}
</pre>

<h3 id="HTML">HTML</h3>

<pre class="brush: html">&lt;p id="myRandText"&gt;随机数字: &lt;/p&gt;
&lt;button type="button" onClick='genRandomNumbers()'&gt;生成10个随机数字&lt;/button&gt;</pre>

<h3 id="结果">结果</h3>

<p>{{ EmbedLiveSample('Example') }}</p>

<h2 id="规范">规范</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">规范</th>
   <th scope="col">状态</th>
   <th scope="col">批注</th>
  </tr>
  <tr>
   <td>{{SpecName("Web Crypto API", "#dfn-GlobalCrypto", "Window.crypto")}}</td>
   <td>{{Spec2("Web Crypto API")}}</td>
   <td>Initial definition</td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器支持">浏览器支持</h2>

<p>{{CompatibilityTable}}</p>

<div id="compat-desktop">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Chrome</th>
   <th>Firefox (Gecko)</th>
   <th>Internet Explorer</th>
   <th>Edge</th>
   <th>Opera</th>
   <th>Safari</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>44 {{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>11 {{property_prefix("ms")}}</td>
   <td>20</td>
   <td>19</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
 </tbody>
</table>
</div>

<div id="compat-mobile">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Chrome for Android</th>
   <th>Firefox Mobile</th>
   <th>Firefox OS</th>
   <th>IE Phone</th>
   <th>Opera Mobile</th>
   <th>Safari Mobile</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
 </tbody>
</table>
</div>

<h2 id="另见">另见</h2>

<ul>
 <li>The {{domxref("Window")}} global object</li>
</ul>