What is Secure SDLC (SSDLC)?

A Secure Software Development Lifecycle (SSDLC) integrates security into every phase of building software — requirements, design, implementation, testing, and release — rather than bolting it on at the end. The aim is to find and fix security issues as early and cheaply as possible.

Threat modeling is a core SSDLC practice in the design phase, identifying flaws before code is written. For threat modeling to keep up with a modern SSDLC, it has to be automated and continuous rather than a manual gate.