Window.crypto

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

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Window.crypto даёт доступ к интерфейсу Crypto. Этот интерфейс предоставляет веб-странице доступ к встроенным в браузер возможностям криптографии.

Синтаксис

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

Specification
Web Cryptography API # dom-windoworworkerglobalscope-crypto