Abstract: A speech interface device is configured to defer encryption of audio data on-device until a time when the encryption operation is not competing with other computationally-intensive operations for responding to the audio data. For example, audio data based on sound captured in an environment of the speech interface device can be stored in volatile memory of the speech interface device, without encrypting it, until a set of processing operations (e.g., ASR processing, NLU processing, audio event processing, etc.) performed based on the audio data have stopped. Based on a determination that these processing operations for responding to the audio data have stopped, the logic may encrypt the audio data to generate encrypted data, and the encrypted data can be stored in non-volatile memory of the speech interface device for uploading to a remote system when a connection is available.

Abstract: A speech interface device is configured to defer encryption of audio data on-device until a time when the encryption operation is not competing with other computationally-intensive operations for responding to the audio data. For example, audio data based on sound captured in an environment of the speech interface device can be stored in volatile memory of the speech interface device, without encrypting it, until a set of processing operations (e.g., ASR processing, NLU processing, audio event processing, etc.) performed based on the audio data have stopped. Based on a determination that these processing operations for responding to the audio data have stopped, the logic may encrypt the audio data to generate encrypted data, and the encrypted data can be stored in non-volatile memory of the speech interface device for uploading to a remote system when a connection is available.