# Biometrics Authentication and Liveness detection Keyless implements genuine identity assurance, which combines two important aspects: * Identity assurance (face matching): Keyless verifies that the person in front of the device is the same person that enrolled and validated their identity during account creation * Genuine presence (liveness detection): Keyless implements state-of-the-art passive offline liveness detection in our SDK. This technology ensures that biometric data is sampled from a live person in front of the camera at the moment of capture Together, these aspects guarantee that for any authentication it is possible to strongly and reliably link the current user back to the user that enrolled with Keyless. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.keyless.io/why-keyless/biometrics-authentication-and-liveness-detection.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.