An engineer's guide to mobile biometrics: event- vs result-based

The second part of a three-part series by Stytch, authored by Spencer Lichtenberg, delves into the intricacies of mobile biometric authentication, focusing on event-based versus result-based architectures. Event-based biometric authentication is highlighted as less secure due to its reliance on boolean logic and the potential for spoofing or insecure local storage of sensitive data. In contrast, result-based biometrics employ hardware-backed APIs to protect cryptographic keys, offering enhanced security by requiring biometric authentication to access these keys. The application sandbox is crucial for storing credentials securely within the device, impacting the security effectiveness of these architectures. While event-based methods are easier to implement, result-based architectures provide a higher level of security and are recommended for applications handling sensitive data, aligning with higher standards like MASVS L2. Stytch's mobile SDKs aim to simplify the implementation of result-based biometrics, combining security with ease of integration, and the article sets the stage for further exploration of Android-specific biometric authentication challenges in the series’ next installment.

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