WorkerGlobalScope: crypto property

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.

We’d love to hear your thoughts on the next set of proposals for the JavaScript language. You can find a description of the proposals here.
Please take two minutes to fill out our short survey.

Note: This feature is only available in Web Workers.

The crypto read-only property of the WorkerGlobalScope interface returns the Crypto object for this worker. This object gives workers access to certain cryptographic related services.

Although the property itself is read-only, all of its methods (and the methods of its child object, SubtleCrypto) are not read-only, and therefore vulnerable to attack by polyfill.

Although crypto is available on all workers, the returned Crypto object only has one usable feature in insecure contexts: the getRandomValues() method. In general, you should use this API only in secure contexts.

Value

An instance of the Crypto interface, providing access to general-purpose cryptography and a strong random-number generator.

Examples

See the example on the page for Window.crypto, which uses the crypto property to access the getRandomValues() method.

Specifications

Specification
Web Cryptography API
# dom-windoworworkerglobalscope-crypto

Browser compatibility

See also