Subresource integrity

A really useful feature, which I hope gets broad browser support: Subresource integrity.

It basically allows a reference to include the SHA256 hash of the expected result. As such, you could link to a download on another site and verify that the downloaded file was not tampered with.

Another use I would like is if the browser can verify that the downloaded file is not corrupted.

Thanks to CodesInChaos for pointing this out!

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