Navigator.requestMediaKeySystemAccess() provides access to MediaKeySystemAccess object that allows to query supported encryption mechanisms and other information about the system.

For example, visit https://www.fit.vutbr.cz/~polcak/jsr/hdcp/ and try a different browser or computer.

\see https://w3c.github.io/encrypted-media/ \see https://developer.mozilla.org/en-US/docs/Web/API/Navigator/requestMediaKeySystemAccess \see https://developer.mozilla.org/en-US/docs/Web/API/MediaKeySystemAccess \see https://developer.mozilla.org/en-US/docs/Web/API/MediaKeySystemAccess/getConfiguration

We provide two modes of protection:

1. Strict approach prevents accessing the API.
2. Farbling approach changes the output to a non-existing key system with 12.5% probability.