1. A method for identifying a false representation of a human face, the method comprising: receiving a plurality of different data streams captured by a respective plurality of sensors of differing sensor types sensing a candidate face; in a cascading plurality of stages, analyzing one or more of the plurality of different data streams to determine that one or more of the different data streams corresponds to the false representation of the human face, wherein at least one of the stages comprises analyzing at least a depth information data stream from the plurality of different data streams to determine if the depth information data stream corresponds to the false representation of the human face; and based at least in part on determining that the one or more of the different data streams corresponds to the false representation of the human face, outputting an indication of the false representation of the human face.