https://sites.google.com/view/howtouseaiinapplicationsd8e/gen-ai-in-cybersecurity AppSec is a multi-faceted, robust strategy that goes far beyond the simple vulnerability scan and remediation. A systematic, comprehensive approach is required to integrate security into all stages of development. The constantly evolving threat landscape and the ever-growing complexity of software architectures is driving the need for a proactive, holistic approach. This comprehensive guide outlines the most important elements, best practices and the latest technology to support an efficient AppSec programme. It helps organizations enhance their software assets, minimize risks, and establish a secure culture. The success of an AppSec program relies on a fundamental change in mindset. Security should be seen as an integral part of the process of development, not an afterthought. This paradigm shift requires close collaboration between developers, security personnel, operations, and others. It helps break down the silos that hinder communication, creates a sense shared responsibility, and promotes collaboration in the security of apps that they develop, deploy or manage. DevSecOps allows organizations to incorporate security into their processes for development. It ensures that security is considered throughout the process, from ideation, development, and deployment all the way to continuous maintenance. This collaboration approach is based on the development of security standards and guidelines, which offer a framework for secure code, threat modeling, and management of vulnerabilities. The policies must be based upon industry best practices, including the OWASP Top Ten, NIST guidelines and the CWE (Common Weakness Enumeration) and take into consideration the specific requirements and risk profiles of the specific application and business environment. The policies can be written down and made accessible to everyone and organizations will be able to be able to have a consistent, standard