What is meant by "security by design" in web applications?

"Security by design" refers to the practice of integrating security measures from the very beginning of the web application development process. This approach emphasizes that security should not be an afterthought or something that is added once a product is developed. Instead, it advocates for incorporating security considerations into the design and architecture of the application from the outset.

This proactive stance allows developers to identify potential security risks early in the development lifecycle, implement appropriate controls, and ensure that security is an inherent part of the application’s functionality. By planning for security from the beginning, organizations can build more resilient systems that are less vulnerable to attacks and security breaches. This method also fosters a culture of security awareness within development teams, leading to better practices and more secure software overall.

In contrast, delaying security measures until after product launch, applying them reactively when issues arise, or prioritizing performance over security can lead to significant vulnerabilities that might be exploited by malicious actors. This highlights the importance of embedding security into the core of web application development.