Certified Application Security Engineer .NET (CASE .NET) — Lesson 1: Secure SDLC, Requirements, Threat Modeling, Architecture, and Design Review

Learning Objectives

• Explain the structures, services, data, settings, roles, and dependencies governing Security Requirements and Threat Modeling.
• Implement and validate Trust Boundaries, Secure Architecture, and Abuse Cases and Design Review using reviewable evidence.
• Evaluate the condition where the observed result differs from the approved Security Requirements baseline because Threat Modeling scope, permissions, or prerequisites were missed and select a proportionate corrective response.

Detailed Topics

• Security Requirements applied to the course scenario, expected behavior, dependencies, controls, and evidence.
• Threat Modeling applied to the course scenario, expected behavior, dependencies, controls, and evidence.
• Trust Boundaries applied to the course scenario, expected behavior, dependencies, controls, and evidence.
• Secure Architecture applied to the course scenario, expected behavior, dependencies, controls, and evidence.
• Abuse Cases and Design Review applied to the course scenario, expected behavior, dependencies, controls, and evidence.

Instructor Demonstration

The instructor traces a development team must release a business application while preventing common weaknesses, proving control effectiveness, and maintaining secure delivery evidence. The walkthrough connects tools, configuration or analysis logic, system messages, decisions, and evidence captured in the secure .NET design, code-review record, test evidence, and release-security checklist. It also tests the exception where the observed result differs from the approved Security Requirements baseline because Threat Modeling scope, permissions, or prerequisites were missed.

Hands-On Exercise

Complete a controlled, authorized EC-Council exercise covering Secure SDLC, Requirements, Threat Modeling, Architecture, and Design Review and preserve the verified result in the secure .NET design, code-review record, test evidence, and release-security checklist.

1. Confirm scope, authorization, prerequisites, versions, identities, dependencies, and acceptance criteria.
2. Execute the workflow while recording settings, outputs, events, decisions, and system messages.
3. Test normal behavior, one boundary condition, and the stated exception without targeting real third-party systems.
4. Document corrections, evidence, ownership, retest criteria, rollback or recovery, and handover actions.

Scenario Analysis

• Identify which object, service, policy, setting, or sequence most strongly influences Security Requirements.
• Compare two defensible responses and explain technical, security, operational, legal, and support trade-offs.
• Determine how the secure .NET design, code-review record, test evidence, and release-security checklist should be approved, retained, retested, and updated.

Troubleshooting Guidance

Start where expected behavior first differs from the observed result. Check authorization, prerequisites, identity, configuration order, data quality, version compatibility, connectivity, status, resource limits, and evidence separately. Treat “the observed result differs from the approved Security Requirements baseline because Threat Modeling scope, permissions, or prerequisites were missed” as a hypothesis until logs, settings, captured outputs, and retest outcomes confirm the cause.

Validation Checklist

• Required components, identities, permissions, settings, safety controls, and dependencies are present.
• The secure .NET design, code-review record, test evidence, and release-security checklist connects each conclusion to objective, reviewable evidence.
• Normal processing, a boundary condition, dependency behavior, and the stated exception were tested.
• Corrections, ownership, retest criteria, rollback or recovery, documentation, and operational handover are complete.

Lesson Outcome

Learners can apply Secure SDLC, Requirements, Threat Modeling, Architecture, and Design Review, explain the resulting security or operational behavior, and defend the outcome through the secure .NET design, code-review record, test evidence, and release-security checklist.