Abstract: Various embodiments of an apparatus, methods, systems and computer program products described herein are directed to a Detection Engine that triggers playback of an audio signal at a defined frequency from a speaker module associated with a computing device. The Detection Engine receives a reflected signal captured by a microphone module associated with the computing device. In some embodiments, the reflected signal corresponds to the triggered audio signal. The Detection Engine determines whether there is suspicious activity occurring with respect to the computing device based on at least one characteristic of the reflected signal.

Abstract: Methods, systems, and devices are provided for generating biometric signatures. The system can detect, at an electronic device, one or more biometric acoustic signals. The system can generate a biometric signal input of the one or more biometric acoustic signals. The system can apply a machine learning model to conduct feature extraction of the biometric signal input having one or more biometric acoustic signals. The system can generate a biometric user signature of the user from the machine learning model. The system can perform one or more privacy preserving hashing functions to the biometric user signature to generate a hashed biometric user signature. The system can determine whether the hashed biometric user signature satisfies a predetermined threshold with an enrollment hashed signature of the user. And the system can authenticate an identity of the user upon detecting that the hashed biometric user signature satisfies the predetermined threshold.