User authentication, for assistant action, using data from other device(s) in a shared environment

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

• receiving, by an automated assistant, a request that is subject to user authentication via multi-factor authentication,
• wherein the automated assistant is accessible via the computing device, and the request is embodied in a spoken utterance from a user;
• soliciting, in response to receiving the request, one or more other devices for data in furtherance of verifying a factor of authentication of the multi-factor authentication,
• wherein the one or more other devices are separate from the computing device;
• receiving, in response to the soliciting and from a particular device of the one or more other devices, non-biometric device data that indicates a degree to which a particular user is predicted to have interacted with the particular device within a period of time before and/or during the computing device receiving the spoken utterance;
• wherein the non-biometric device data is generated without utilizing any biometric data;
• determining, based on the spoken utterance and the received non-biometric device data, whether to authenticate the particular user via the multi-factor authentication;
• and
• when the automated assistant determines to verify the particular user via the multi-factor authentication:
• causing the automated assistant to initialize performance of one or more operations in furtherance of fulfilling the request.

A method implemented by one or more processors, the method comprising:

• determining, by an automated assistant at a computing device, to solicit one or more other devices for data in furtherance of authenticating a user before the user subsequently interacts with the automated assistant,
• wherein the one or more other devices are separate from the computing device that provides access to the automated assistant;
• receiving, from a particular device of the one or more other devices, non-biometric device data that indicates a degree to which a particular user is predicted to have interacted with the particular device,
• wherein the non-biometric device data is generated without utilizing any biometric data;
• determining, based at least on receiving the non-biometric device data, whether to authenticate the particular user before the particular user subsequently interacts with the automated assistant;
• and
• when the automated assistant determines to authenticate the particular user before the particular user subsequently interacts with the automated assistant:
• causing the automated assistant to initialize, for the particular user, caching of certain assistant data at the computing device and/or a separate computing device in furtherance of fulfilling a request that the user is predicted to provide.