Radar-based behaviometric user authentication

A method of authenticating a user using a mobile device, the method comprising:

• generating and storing a first behaviometric user pattern for an authenticated user, said pattern including a position and velocity of said first authenticated user relative to said mobile device, said position and velocity of said authenticated user relative to said mobile device determined by a received response from a radar transmission sent by said mobile device while said first user uses said mobile device, said radar transmission transmitted piece-wise continuously over time such that said received response indicates a position and velocity of said first authenticated user over time;
• determining, based on further received responses of additional radar transmissions sent by said mobile device, an additional behavioral pattern of an unknown user, said additional behavioral pattern including a position and velocity of said unknown user relative to said mobile device;
• comparing said additional behavioral pattern to said first behaviometric user pattern;
• determining heuristically, based on said comparing, a measure of similarity between said first behaviometric user pattern and said additional behavioral pattern;
• determining, based on said measure of similarity, if said unknown user is said authenticated user;
• preventing operation or access to at least some data stored on said mobile device if said unknown user is not said authenticated user;
• and
• granting operation or access to at least some data stored on said mobile device if said unknown user is said authenticated user;
• wherein said determining said additional behavioral pattern is synchronized in time with receipt, from said unknown user, of user responses to user prompts.

A method of authenticating a user using a mobile device, the method comprising:

• generating and storing a first behaviometric user pattern for an authenticated user, said pattern including a position and velocity of said first authenticated user relative to said mobile device, said position and velocity of said authenticated user relative to said mobile device determined by a received response from a radar transmission sent by said mobile device while said first user uses said mobile device, said radar transmission transmitted piece-wise continuously over time such that said received response indicates a position and velocity of said first authenticated user over time;
• determining, based on further received responses of additional radar transmissions sent by said mobile device, an additional behavioral pattern of an unknown user, said additional behavioral pattern including a position and velocity of said unknown user relative to said mobile device;
• comparing said additional behavioral pattern to said first behaviometric user pattern;
• determining heuristically, based on said comparing, a measure of similarity between said first behaviometric user pattern and said additional behavioral pattern;
• determining, based on said measure of similarity, if said unknown user is said authenticated user;
• preventing operation or access to at least some data stored on said mobile device if said unknown user is not said authenticated user;
• and
• granting operation or access to at least some data stored on said mobile device if said unknown user is said authenticated user;
• further comprising receiving user-specific credentials from said unknown user,
• wherein said determining said additional behavioral pattern occurs during said receiving of said user-specific credentials from said unknown user,
• wherein said additional behavioral pattern includes at least one of key pressing time stamps, swiping time stamps, and scrolling time stamps, as well as behavioral patterns of the user's finger movement during said unknown user entering said user-specific credentials.