A secure software development lifecycle, or SSDLC, is a development approach that builds security activities into planning, design, coding, testing, release, and maintenance. It matters because software risk is easier to reduce when security is part of the delivery process instead of an afterthought.
What is a Secure Software Development Lifecycle (SSDLC)?
SSDLC extends a normal software development lifecycle by adding security requirements, design reviews, code safeguards, testing practices, dependency checks, and release controls. The goal is to reduce exploitable weaknesses before software reaches production.
Organizations may implement SSDLC through secure coding standards, pull-request checks, developer education, architecture review, automated scanning, and release gating.
Common SSDLC Practices
Common practices include threat modeling, code review, dependency monitoring, secrets handling controls, static analysis, dynamic testing, secure configuration review, and remediation tracking.
SSDLC vs. AppSec Testing Alone
AppSec testing is one part of SSDLC. SSDLC is broader because it embeds security across the full software lifecycle instead of relying on a single testing stage near release.
Frequently Asked Questions
Does SSDLC slow down development?
It can add process, but mature teams usually find that earlier security work reduces expensive late-stage surprises, production incidents, and rework.
Who owns SSDLC?
It is usually shared across engineering, security, platform, and product leadership rather than owned by only one team.
Related Cybersecurity Terms
