CSP stands for Content Security Policy. It's a security feature implemented in web browsers that helps protect websites from malicious attacks, specifically those that try to inject unauthorized code into a trusted website.
Here's a breakdown of how CSP works:
Website administrators define a policy:
They specify which resources, like scripts and images, are allowed to load on their website and from which sources. This is done through a special HTTP header or a meta tag.
Browser enforces the policy:
When you visit a website with a CSP, your web browser checks the policy to see if the loaded resources are authorized.
Unauthorized resources are blocked:
If a resource attempts to load from a source not allowed by the policy, the browser will block it. This helps prevent malicious code from being injected and executed on the website.
CSP is particularly effective in mitigating:
Cross-site scripting (XSS) attacks:
These attacks inject malicious scripts into a website that can steal data, redirect users to phishing sites, or deface the website.
Clickjacking attacks:
These attacks trick users into clicking on something unintended, like a hidden button.
By implementing CSP, website owners can significantly improve the security of their websites and protect their users from online threats.
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