How SAST, DAST and Automated Testing Secure Software Without Slowing Delivery

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A software quality and security consultant, writing for DEV Community, explains how modern development teams can prevent data breaches using a combination of SAST, DAST, and automated testing. SAST (Static Application Security Testing) scans source code before execution to detect vulnerabilities like SQL injection, hardcoded secrets, and weak encryption, while DAST (Dynamic Application Security Testing) probes a live application the way a real attacker would, catching runtime flaws such as misconfigured CORS and missing security headers. The two tools are designed to complement each other and are both recommended by frameworks like OWASP SAMM, with SAST applied early in the CI/CD pipeline and DAST applied once the application is running in a staging environment. Automated unit and integration tests written by developers themselves serve as the first line of defense, catching security-relevant logic errors before dedicated security tooling even runs. The article argues that treating security as a built-in practice rather than a separate step allows fast-moving teams to maintain delivery speed without compromising code safety.

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