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Excellium services newsletter : Content-Security-Policy header

Since web 2.0, websites use more codes and resources on the client-side. This is due to the large number of JavaScript libraries which allow having a beautiful website with animation and live to update. The JS is present on most websites. To use this JS, when the browser downloads the HTML page, we need to load other resources such as images, style sheets or JS. When all elements are loaded, the browser renders the website and runs the JS on the client computer.

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