How can I ensure the security of my web application and protect user data?
To ensure the security of your web application and protect user data, you need to follow best practices in various areas including **authentication**, **authorization**, **secure coding**, **encryption**, **regular updates and patching**, **secure architecture**, and **regular security audits**. Implementing a secure development life cycle, using strong and unique passwords, employing multi-factor authentication, input validation, and output sanitization are essential security measures. Additionally, ensure secure communication through HTTPS, protect against common security vulnerabilities such as Cross-Site Scripting (XSS) and SQL injection, and regularly test and monitor your web application for vulnerabilities.