Crypto

The Crypto interface represents basic cryptography features available in the current context. It allows access to a cryptographically strong random number generator and to cryptographic primitives.

Note:

This feature is available in Web Workers.

The Web Crypto API is accessed through the Window.crypto property, which is a Crypto object.

Properties

This interface implements properties defined on RandomSource.

Crypto.subtle Read only Secure context
Returns a SubtleCrypto object providing access to common cryptographic primitives, like hashing, signing, encryption, or decryption.

Methods

This interface implements methods defined on RandomSource.

Crypto.getRandomValues()
Fills the passed TypedArray with cryptographically sound random values.

Usage notes

You should avoid using the Web Crypto API on insecure contexts, even though the Crypto interface is present on insecure contexts, as is the Window.crypto property. In addition, the Crypto method getRandomValues() is available on insecure contexts, but the subtle property is not.

In general, you probably should just treat Crypto as available only on secure contexts.

Specifications

Specification Status Comment
Web Cryptography API
The definition of 'Crypto' in that specification.
Recommendation Initial definition

Browser compatibility

BCD tables only load in the browser

See also