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 Specifications Specification Status Comment Web Cryptography APIThe definition of 'Window.crypto' in that specification. Candidate Recommendation Initial definition Browser compatibility Desktop Mobile Feature Chrome Firefox (Gecko) Internet Explorer Edge Opera Safari Basic support 44 (Yes) (Yes) 6 ms 20 19 (Yes) Feature Chrome for Android Firefox Mobile Firefox OS IE Phone Opera Mobile Safari Mobile Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes) See also The Window global object