Note that throughout the document, the terms "systems" and "applications" are used interchangeably. Document security controls that may be put in place to reduce the likelihood or impact.Document as many potential threats to the system as possible.Document how data flows through a system to identify where the system might be attacked.When you produce a threat model, you will: Assessing potential threats during the design phase of your project can save significant resources that might be needed to refactor the project to include risk mitigations during a later phase of the project.
Optimally, you will create your threat models and determine which mitigations are needed during an early stage of the development of a new system, application, or feature. All developers, software and system designers, and architects should strive to include threat modeling in their software development life cycle. You do not need to be a security expert in order to implement the techniques covered in this cheat sheet. This cheat sheet aims to provide guidance on how to create threat models for both existing systems or applications as well as new systems. Threat modeling is a structured approach of identifying and prioritizing potential threats to a system, and determining the value that potential mitigations would have in reducing or neutralizing those threats. Threat Modeling Cheat Sheet ¶ Introduction ¶ Reduce risk in risk log for verified treated risk
Test risk treatment to verify remediation Select appropriate controls to mitigate the risk Map Threat agents to application Entry pointsĭefine the Impact and Probability for each threatĪgree on risk mitigation with risk owners and stakeholders Highlight Authorization per user role over the DFD Manage to present your DFD in the context of MVCĭefine applications user roles and trust levels Insecure Direct Object Reference PreventionĬonsider Data in transit and Data at rest
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