Nok Nok Smart Sense is an add-on module for the Nok Nok S3 Suite and Nok Nok Authentication Cloud that introduces AI/ML-based anomaly detection into passkey-based authentication workflows. The product analyzes user behavior to generate an "anomaly score" for each authentication event. This score is fed into the Nok Nok rules engine, allowing organizations to adjust authentication requirements dynamically based on the assessed risk level of each event. Key behaviors enabled by the anomaly score include: - Triggering passkey creation (via Registration Rules) when the anomaly score is low, reducing risk at the point of passkey enrollment. - Setting user verification to "required" when anomalies are detected, while defaulting to "preferred" in normal conditions — a feature that also supports usability for users in laptop "clamshell mode" where biometric sensors may be inaccessible. - Triggering step-up authentication when a synced passkey is used on an unrecognized device for the first time, or when the passkey provider does not supply an "authentication intent" signal, in alignment with NIST SP 800-63 guidelines. Smart Sense is designed to complement phishing-resistant passkey authentication already provided by Nok Nok's platform, adding risk-signal context to reduce fraud and bot/account takeover attacks without significantly increasing friction for legitimate users.