🛡️ Security & DevSecOps

Security and DevSecOps work together to ensure that software is secure by design, secure in development, and secure in operation. Security focuses on protecting systems and data, while DevSecOps integrates those protections directly into the software delivery lifecycle, making security continuous, automated, and shared across teams.

Security vs DevSecOps — definition

Security
Protects systems, applications, and data through controls such as authentication, authorization, encryption, monitoring, and incident response.

DevSecOps
Integrates security practices into every phase of the software development lifecycle (SDLC), emphasizing automation, collaboration, and continuous improvement.
NIST describes DevSecOps as embedding security into Plan → Develop → Build → Test → Release → Deploy → Operate phases with continuous monitoring and feedback.

OWASP defines DevSecOps as a framework built on People, Process, and Governance, with security embedded into every SDLC stage (Design, Develop, Build, Test, Release, Deploy, Operate).

NIST - DevSecOps | OWASP DevSecOps Guideline

Why DevSecOps exists

Traditional security happens after development, causing late discoveries, delays, and vulnerabilities.
DevSecOps shifts security left and everywhere, making it:

Continuous
Automated
Developer‑friendly
Integrated into CI/CD
Aligned with agile and cloud‑native delivery

NIST emphasizes that DevSecOps improves efficiency, strengthens software supply‑chain security, and automates SSDF (Secure Software Development Framework) practices across pipelines.

NIST Computer Security Resource Center

Core principles of DevSecOps

1. Shift‑left security

Security checks happen early (IDE, pre‑commit, pull request).
OWASP maps security controls to every SDLC stage, starting at design and development.

2. Automation

Automated SAST, SCA, IaC scanning, container scanning, and policy gates.
Octopus Deploy highlights automation as key for consistency and rapid feedback.

Octopus Deploy

3. Security as shared responsibility

Security is owned by developers, security engineers, and operations teams together.
OWASP emphasizes People + Process + Governance as equal pillars.

4. Continuous monitoring

Runtime monitoring, anomaly detection, and continuous feedback loops.
NIST includes continuous improvements, monitoring, and feedback as core lifecycle elements.

5. Supply‑chain security

SBOMs, artifact signing, dependency scanning, provenance verification.
OWASP explicitly includes SBOM, artifact signing, and CI/CD pipeline security in its 2025/2026 guideline.

6. Zero‑trust principles

NIST highlights zero‑trust as foundational to modern DevSecOps pipelines.

DevSecOps lifecycle (NIST model)

NIST defines DevSecOps as a continuous lifecycle with security embedded in each phase:

Plan — threat modeling, secure requirements
Develop — secure coding, secrets management
Build — SAST, SCA, container scanning, IaC scanning
Test — IAST, DAST, mobile testing
Release — signing, policy gates
Deploy — secure configuration, runtime hardening
Operate — monitoring, incident response
Continuous improvement — feedback loops, analytics

OWASP mirrors this lifecycle with detailed controls mapped to each stage.

DevSecOps best practices (2026)

Grounded in NIST, OWASP, and industry guidance.

1. Security‑first culture

Cross‑functional collaboration between dev, ops, and security teams.
Octopus Deploy emphasizes collaboration as a core DevSecOps principle.

2. Threat modeling early

OWASP includes threat modeling in the Design stage of DevSecOps.

3. Secrets management

OWASP lists secrets management as a required pre‑commit control.

4. Static & dynamic analysis

SAST (static analysis)
SCA (dependency scanning)
IAST (interactive testing)
DAST (dynamic testing)
All included in OWASP’s Build and Test stages.

5. Container & IaC security

OWASP includes container scanning, container hardening, and IaC scanning as required DevSecOps controls.

6. Security gates in CI/CD

Policy gates enforce standards before release.
NIST demonstrates how SSDF practices are enforced through CI/CD gates.

7. SBOM + artifact signing

OWASP includes SBOM generation and artifact signing as supply‑chain controls.

8. Reduce alert fatigue

Modern DevSecOps guidance warns against “scan everything” approaches that overwhelm developers.
High‑signal, contextual findings reduce noise and improve adoption

DevSecOps Best Practices: A 2026 Implementation Guide.

Security in DevSecOps (technical controls)

Security controls integrated into DevSecOps pipelines include:

Identity & access management
mTLS for service‑to‑service communication
JWT/OAuth2 for API security
Secrets vaults
Encrypted storage & transport
Runtime security (RASP, eBPF monitoring)
Policy‑as‑code (OPA, Kyverno)
Continuous vulnerability management
Zero‑trust enforcement

These align with NIST’s zero‑trust and continuous monitoring guidance.

Security vs DevSecOps — comparison table

Topic	Security	DevSecOps
Focus	Protect systems & data	Integrate security into SDLC
Timing	After development	Continuous (shift‑left + shift‑everywhere)
Ownership	Security team	Shared across dev, ops, security
Controls	Authentication, authorization, encryption	Automated SAST, SCA, IaC scanning, SBOM, policy gates
Approach	Perimeter‑based	Zero‑trust, identity‑centric
Tooling	Firewalls, SIEM, IAM	CI/CD security, pipeline automation, supply‑chain security

Takeaway

Security protects systems.
DevSecOps ensures security is built into how systems are created.

Authoritative sources (NIST, OWASP, Octopus Deploy) agree that DevSecOps is:

Continuous
Automated
Collaborative
Zero‑trust aligned
Supply‑chain aware
Embedded into CI/CD
Focused on high‑signal, actionable security

This makes modern software secure by default, not secure as an afterthought.