HTTP security headers
HTTP security headers are simple text instructions sent with every web page to tell browsers and other tools how to handle the page securely.
A website sends HTTP security headers to browsers to make sure visitors are safe. These headers are like rules that tell the browser what kind of content it can load, whether to block certain scripts, and how to handle cookies. They are part of the HTTP protocol, which is the language the web uses to send information between your browser and the website.
What it means
HTTP security headers are part of the communication between a website and your browser. They help prevent attacks like cross-site scripting (XSS) and clickjacking by controlling how content is displayed and loaded. For example, the Content-Security-Policy header can stop your browser from loading scripts from untrusted sources.
Why it matters
These headers are a key part of website security. They help protect visitors from malicious scripts and ensure that your site is handled safely by browsers. Without them, attackers could inject harmful code into your site, making it dangerous for users.
What to do
If you run a website, make sure your server is configured to send essential HTTP security headers. You can check this using a website security scanner tool. Look for headers like Content-Security-Policy, X-Content-Type-Options, and X-Frame-Options. If they're missing, your site may be more vulnerable to attacks.