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This lesson compares DevOps and DevSecOps and explains why integrating security earlier in the delivery process matters. DevOps improves speed and collaboration between development and operations by automating build, test, and deployment workflows. Traditional DevOps often defers security checks until late in the pipeline, increasing the chance that vulnerabilities reach staging or production. DevSecOps embeds security into the DevOps workflow, making security an integral, automated part of continuous delivery. In short: DevOps automates delivery and monitoring; DevSecOps extends that automation to include security tooling and policy enforcement across the pipeline.
The image compares DevOps and DevSecOps using two diagrams: an infinity loop highlighting security at each stage and a Venn diagram showing the integration of development, operations, security, and testing.

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Typical DevOps pipeline (example flow)

A common continuous delivery flow looks like this:

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Where security often appears in traditional DevOps

  • Security checks are frequently scheduled late: end-of-pipeline vulnerability scans, penetration tests, or manual reviews.
  • Because security is an end-stage activity, important issues may be discovered only after deployment to staging or production.

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Why late security is problematic

  • High risk: Critical vulnerabilities (e.g., SQL injection) discovered in production may already be exploitable.
  • Resource waste: Running and deploying vulnerable builds consumes compute, storage, and bandwidth unnecessarily.
  • Higher cost: Fixes discovered late require rollbacks or hotfixes and re-running the entire pipeline—this is more expensive than early remediation.
  • Delivery slowdowns: Reprocessing a pipeline for a single fix delays other feature deliveries and reduces throughput.

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A sequential (real-world) example

  • Application is deployed to production.
  • A late security test detects a high-severity vulnerability (for example, SQL injection).
  • Remediation requires a code change, a new build, full pipeline execution (tests, staging, production), and additional verification—this reintroduces risk and delays releases.

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What DevSecOps brings: shift-left security

Shift-left security integrates security earlier in the development lifecycle by embedding automated security checks into CI/CD and developer workflows. This approach transforms security from an afterthought into a continuous, developer-visible activity. Table: Common security controls and where they run Benefits of embedding these checks into CI/CD:
  • Faster feedback to developers (fail-fast on obvious issues).
  • Prevent vulnerable artifacts from reaching production.
  • Make security part of the developer workflow and culture.

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Benefits of shifting left with DevSecOps

Shift-left security isn’t about blocking delivery; it’s about automated, actionable feedback. Use strict fail conditions for high-severity issues and advisory checks for low-severity findings so teams can deliver features quickly while keeping risk low.

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Practical next steps to adopt DevSecOps

  • Start by adding SAST and dependency scanning to pull-request CI jobs.
  • Add IaC scanning to the pipeline before infrastructure provisioning (see Terraform Basics Training Course).
  • Run container image scans as part of your image build process and block pushes for critical findings.
  • Schedule DAST against staging and use runtime defense tools in production.
  • Integrate security results into issue trackers and developer workflows so remediation is tracked and measured.
By embedding security tooling and policies into CI/CD and the developer lifecycle, DevSecOps enables teams to deliver software faster, safer, and with measurable, predictable risk management. That’s all for now.

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