Systems and methods for three-dimensional audio CAPTCHA

摘要

Systems and methods for generating and performing a three-dimensional audio CAPTCHA are provided. One exemplary system can include a decoy signal database storing a plurality of decoy signals. The system also can include a three-dimensional audio simulation engine for simulating the sounding of a target signal and at least one decoy signal in an acoustic environment and outputting a stereophonic audio signal based on the simulation. One exemplary method includes providing an audio prompt to a resource requesting entity. The audio prompt can have been generated based on a three-dimensional audio simulation of the sounding of a target signal containing an authentication key and at least one decoy signal in an acoustic environment. The method can include receiving a response to the audio prompt from the resource requesting entity and comparing the response to the authentication key.

主权项

1. A system for generating an audio CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) prompt, the system comprising:
a decoy signal database that stores a plurality of decoy signals, the decoy signal database comprising at least one non-transitory computer-readable medium; and a three-dimensional audio simulation engine that simulates the sounding of a target signal and at least one decoy signal in an acoustic environment and outputs a stereophonic audio signal based on the simulation, the stereophonic audio signal usable as the audio CAPTCHA prompt; wherein to simulate the sounding of the target signal and the at least one decoy signal in the three-dimensional acoustic environment, the three-dimensional audio simulation engine:
simulates the reverberation of the target signal and the at least one decoy signal within the acoustic environment; anduses head-related transfer functions to simulate a human spatial listening experience from a designated location in the acoustic environment; and wherein the decoy signal is a first audio speech signal and the target signal is a second audio speech signal containing an authentication key.