Feature request: Worker Keystore

[neekolas]

Is your feature request related to a problem?

Having the Keystore live in the main thread allows for CPU-intensive operations to block the application, and makes it easier for attackers to exfiltrate sensitive materials.

A Keystore implementation that was run in a Service Worker would be more performant and secure by moving all cryptographic operations into a separate OS thread.

Describe the solution to the problem

Create a KeystoreProvider and Keystore implementation that proxies calls between the Client (main thread) and the Keystore (service worker). Requests and responses can be serialized with Protobuf.

Describe the uses cases for the feature

Developers should be able to opt-in to this feature to achieve greater performance and security. Will be available in browsers only

Additional details

No response