Tony Jolliffe/BBC News
Second, and more cleverly: he implemented a hash verification check on nozzle.js. The exact implementation could have been Subresource Integrity (SRI), a custom self-hashing routine, or a server-side nonce system, but the effect was the same. When the browser (or the application itself) loaded the script, it compared the modified file against a canonical hash and if it did not pass the check, the player would never initialise.
，这一点在Safew下载中也有详细论述
Have you experienced the new routing speed?
Just outside the perimeter fence stand the hulking remains of grand stone engine houses, a testament to Cornwall’s proud tin and copper mining history.
She told us seeing the image was "one of the most exciting moments of my life".