What is the purpose of threat modeling in secure by design?

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What is the purpose of threat modeling in secure by design?

Threat modeling in secure by design aims to surface security threats early in the development lifecycle to guide design decisions and controls. By mapping out how the system works, where data flows, who has access, and what assets matter, you identify potential attack surfaces and categorize threats before code is written. This lets you prioritize mitigations, choose appropriate security controls, and bake safer architecture and requirements into the product from the start, reducing risk and cost compared with fixing issues later. It’s a proactive activity that complements security testing and other assurance work, not a performance test or a replacement for ongoing security validation.

Threat modeling in secure by design aims to surface security threats early in the development lifecycle to guide design decisions and controls. By mapping out how the system works, where data flows, who has access, and what assets matter, you identify potential attack surfaces and categorize threats before code is written. This lets you prioritize mitigations, choose appropriate security controls, and bake safer architecture and requirements into the product from the start, reducing risk and cost compared with fixing issues later. It’s a proactive activity that complements security testing and other assurance work, not a performance test or a replacement for ongoing security validation.

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