This document discusses security considerations for DevOps enterprises transitioning to DevSecOps. It identifies three dimensions of security: 1) securing the perimeter, 2) securing the delivery pipeline, and 3) securing deliverables. For the delivery pipeline, it notes vulnerabilities related to supply chains, insider attacks, errors in development, and weaknesses in design/code/integration. It emphasizes applying security practices throughout the development lifecycle, from coding through deployment. The document provides references for further reading on DevOps security best practices.