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Linos Giannopoulos

Content Security Policy

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Content Security Policy (CSP) is a security layer that all modern browsers support with minor differences in regards to how it is being handled [1]. CSP was designed to application attacks such as Cross Site Scripting (XSS) [2] and clickjacking. Notably, such attacks have been popular for more than ten years. A developer can employ CSP to restrict (in a whitelist / blacklist manner) the sources from which the application can receive content. Such content involves several elements: frame-src: which specifies valid sources for nested browsing contexts using elements such as <frame> and <iframe>. img-src: Valid sources for images and favicons. script-src:…

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