A successful biometric prompt does not create server-side transaction authority. Bind local verification, key use and the approved business content correctly.
Evaluation approach
Appropriate access controls can bind a sensitive key operation to user authentication. Design cancellation, lockout and alternative-verification behavior.
Application example
Verify that the key used after approval actually has the expected access conditions.
Limits and considerations
A locally stored biometric-success flag is not trustworthy transaction authorization for the server.
Which operation does biometric success permit?
A successful biometric UI result differs from platform-enforced restrictions on a sensitive key. A decision based only on an in-app success flag needs separate assessment for process interference.
Bind high-impact transaction content to user approval. Define the assurance of password or recovery alternatives when biometrics are unavailable. State how long prior approval remains valid after device-setting changes or a return from the background.
Checks and decisions
- Test cancellation
- Verify key access
- Display transaction content
Match the amount and destination shown to the user with the operation applied by the server.
Sources
The primary references above provide the technical basis. Example workflows and evaluation suggestions are this publication’s explanations, not independent test results for a particular product.