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DevSecOps is the development approach where security is introduced from the early stages of a development lifecycle until the final stages. This methodology integrates security practices seamlessly throughout the entire software development and deployment process, making security a shared responsibility across development, security, and operations teams.

DevSecOps extends the DevOps philosophy by embedding security considerations into every phase of the software delivery pipeline. Rather than treating security as a separate function or final checkpoint, DevSecOps makes security an integral part of the development culture and automated processes.

Core principles of DevSecOps:

• Security as code: Implementing security policies and controls through automated, version-controlled code
• Continuous security: Ongoing security testing and validation throughout the pipeline
• Shared responsibility: All team members contribute to security outcomes
• Fail fast: Early detection and rapid remediation of security issues
• Compliance automation: Automated enforcement of security and regulatory requirements

DevSecOps implementation across lifecycle stages:

• Planning: Threat modeling and security requirements definition
• Development: Secure coding practices and IDE security plugins
• Testing: Automated security testing including SAST, DAST, and dependency scanning
• Deployment: Security validation gates and infrastructure security scanning
• Operations: Runtime security monitoring and incident response

Key benefits include:

• Reduced security vulnerabilities in production applications
• Faster remediation of security issues through early detection
• Improved compliance with security standards and regulations
• Enhanced security awareness across development teams
• Better alignment between security, development, and business objectives

DevSecOps represents the evolution of security practices to match the speed and agility of modern software development while maintaining robust security postures.