Crypto.subtle 是一个只读属性，返回一个 SubtleCrypto 对象允许做一个些加密操作。
语法
var crypto = crypto.subtle;
规范
| Specification | Status | Comment |
|---|---|---|
| Web Cryptography API Crypto.subtle |
Recommendation | Initial definition. |
浏览器支持
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| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | 37 | 34 (34) | 未实现 | ? | 未实现 |
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | (Yes) | 37 | 34.0 (34) | 未实现 | ? | 未实现 |