Threat Model the Payment Change
Use a lightweight threat-model prompt to identify payment-flow security risks in a code change.
The reframe: A payment feature is not done until its security promises are explicit. Start at the change boundary Ask what the feature changes about data, users, systems, and trust. A small checkbox can create a new stored token, a new consent state, a new customer-service flow, and a new deletion obligation. Ask four questions What new payment data enters? Where is it stored or logged? Who or what can use it? What abuse path becomes easier? These questions uncover most PCI-impacting mistakes before code reaches production. Turn the answer into evidence The review should leave a trace: PR comment,…
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