What concept does the "D" represent with the STRIDE threat model?

Name: What concept does the "D" represent with the STRIDE threat model?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Any application can be a possible target of denial-of-service (DoS) attacks. From the application side, the developers should minimize how many operations are performed for non-authenticated users. This will keep the application running as quickly as possible and using the least amount of system resources to help minimize the impact of any such attacks.

What Concept Does the "D" Represent with the STRIDE Threat