Utilization of sandboxed feature detection process to ensure security of captured audio and/or other sensor data

A method implemented by one or more processors of a client device, the method comprising:

• providing, by an operating system of the client device, sensor data to a sandboxed feature detection process that is executing, on the client device, in a sandbox that is controlled by the operating system, wherein the sensor data is based on output from one or more sensors of the client device;
• receiving, by the operating system and from the sandboxed feature detection process, an indication that a feature was detected in the sensor data by the sandboxed feature detection process;
• responsive to receiving the indication, sending, by the operating system and to a non-sandboxed interactor process, at least following sensor data that is based on output from the one or more sensors and that follows the sensor data in which the feature was detected, wherein the operating system restricts the sandboxed feature detection process from sending the sensor data;
• and
• clearing, at intervals, a memory of the sandboxed feature detection process, wherein clearing the memory of the sandboxed feature detection process comprises:
• restarting the sandboxed feature detection process.

A client device, comprising:

• one or more sensors;
• memory storing instructions;
• and
• one or more processors executing the instructions to:
• provide, by an operating system of the client device, sensor data to a sandboxed feature detection process that is executing, on the client device, in a sandbox that is controlled by the operating system, wherein the sensor data is based on output from one or more sensors of the client device;
• receive, by the operating system and from the sandboxed feature detection process, an indication that a feature was detected in the sensor data by the sandboxed feature detection process;
• responsive to receiving the indication, send, by the operating system and to a non-sandboxed interactor process, at least following sensor data that is based on output from the one or more sensors and that follows the sensor data in which the feature was detected, wherein the operating system restricts the sandboxed feature detection process from sending the sensor data;
• and
• fork, at intervals, the sandboxed feature detection process, wherein in forking the sandboxed feature detection process, one or more of the processors are to:
• generate a new instance of the sandboxed feature detection process;
• and
• prune a prior instance of the sandboxed feature detection process.