Web Crypto API
The Web Crypto API is an interface allowing a script to use cryptographic primitives in order to build systems using cryptography.
Note: This feature is available in Web Workers
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
Warning: The Web Crypto API provides a number of low-level cryptographic primitives. It's very easy to misuse them, and the pitfalls involved can be very subtle.
Even assuming you use the basic cryptographic functions correctly, secure key management and overall security system design are extremely hard to get right, and are generally the domain of specialist security experts.
Errors in security system design and implementation can make the security of the system completely ineffective.
Please learn and experiment, but don't guarantee or imply the security of your work before an individual knowledgeable in this subject matter thoroughly reviews it. The Crypto 101 Course can be a great place to start learning about the design and implementation of secure systems.
Interfaces
Some browsers implemented an interface called Crypto without having it well defined or being cryptographically sound. In order to avoid confusion, methods and properties of this interface have been removed from browsers implementing the Web Crypto API, and all Web Crypto API methods are available on a new interface: SubtleCrypto. The Crypto.subtle property gives access to an object implementing it.
Specifications
| Specification |
|---|
| Web Cryptography API # crypto-interface |
Browser compatibility
BCD tables only load in the browser