Gain insights into enforcing web app security best practices, such as HTTPS, defending against XSS and clickjacking, managing HTTP cookies, and warding off DDoS attacks.

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There are more vulnerabilities than ever when creating applications for the web, so it is extremely important that software developers enforce security best practices such as, how to add protection through HTTP headers.

In this course, you will start off by learning how to prevent fraudulent SSL certificates from being served to clients, before moving on to how to defend against XSS attacks and clickjacking. 

In the latter half of the course, you’ll learn security practices related to HTTP cookies, and tips around security tradeoffs that you’ll make in your day-to-day work. Towards the end, you’ll learn how to ward off DDoS attacks, which is crucial when your application scales.

This course will demystify web security, and help you stay on top of important security-related concerns in your web apps.

Web Application Security for the Everyday Software Engineer

As we've seen earlier, XSS attacks allow a malicious user to execute arbitrary JavaScript on a page. Considering that you could read the contents of the cookie jar with a simple `document.cookie`, protecting our cookies from untrusted JavaScript access is a very important aspect of hardening cookies from a security standpoint.

Luckily, the HTTP spec took care of this with the `HttpOnly` flag. By using this directive we can instruct the browser not to share the cookie with JavaScript. The browser then removes the cookie from the `window.cookie` variable, making it impossible to access the cookie via JS.

## Example
If we look at the example at https://x6jr4kg.educative.run/?httponly=on we can clearly see how this works. 



As we've seen earlier, XSS attacks allow a malicious user to execute arbitrary JavaScript on a page. Considering that you could read the contents of the cookie jar with a simple `document.cookie`, protecting our cookies from untrusted JavaScript access is a very important aspect of hardening cookies from a security standpoint.

Luckily, the HTTP spec took care of this with the `HttpOnly` flag. By using this directive we can instruct the browser not to share the cookie with JavaScript. The browser then removes the cookie from the `window.cookie` variable, making it impossible to access the cookie via JS.

# Example
If we look at the example at https://x6jr4kg.educative.run/?httponly=on we can clearly see how this works. 



In this lesson, we'll study how the HttpOnly flag works.

Introduction

Understanding The Browser

HTTP

Protection through HTTP Headers

HTTP Cookies

Situationals

DDoS Attacks

Bug Bounty Programs

Conclusion

JavaScript Can't Touch This

Example