Computer systems and methods for securing access to content provided by virtual assistants

A computing system for authenticating a user of a virtual assistant operating on a computing device, for each request made by the user during a computing session, the computing system comprising:

• the computing device having a processor and a memory;
• a first biometric input device in electronic communication with the computing device;
• and
• a second biometric input device in electronic communication with the computing device;
• wherein the computing device is configured to:
• receive first biometric data from the user via the first biometric input device;
• extract one or more first features from the first biometric data;
• generate a first vector based on the first features;
• compute, using a first neural network in electronic communication with the computing device, a first similarity score reflecting a geometric distance between the first vector and a first reference vector stored in the memory of the computing device;
• receive second biometric data from the user via the second biometric input device;
• extract one or more second features from the second biometric data;
• generate a second vector based on the second features;
• compute, using a second neural network in electronic communication with the computing device, a second similarity score reflecting a geometric distance between the second vector and a second reference vector stored in memory of the computing device;
• compute, using a third neural network in electronic communication with the computing device, a confidence score based on the first and second similarity scores;
• and determine a right of the user to access restricted information based on the confidence score.

A computerized method of training a computing device to recognize a user of a virtual assistant operating on the computing device, for each request made by the user during a computing session, the method comprising:

• generating, by the computing device, a device profile for the user, the device profile stored in memory of the computing device and including a device identifier and a user profile identifier;
• receiving;
• by a computing device, first reference biometric data from the user via a first biometric input device in electronic communication with the computing device;
• extracting, by the computing device, one or more first reference features from the first reference biometric data;
• generating;
• by the computing device;
• a first reference vector based on the first reference features;
• storing, by the computing device, the first reference vector in a memory section of the computing device associated with the device profile, the first reference vector usable for computation, using a first neural network, of a first similarity score between the first reference vector and a first vector generated based on first biometric data obtained from the user during a computing session;
• receiving, by the computing device, second reference biometric data from the user via a second biometric input device in electronic communication with the computing device;
• extracting, by the computing device, one or more second reference features from the second reference biometric data;
• generating, by the computing device, a second reference vector based on the second reference features;
• and
• storing, by the computing device, the second reference vector in a memory section of the computing device associated with the device profile, the second reference vector usable for computation, using a second neural network, of a second similarity score between the second reference vector and a second vector generated based on second biometric data obtained from the user during the computing session,
• wherein the first and second similarity scores are usable by a third neural network in electronic communication with the computing device to compute a confidence score based on the first and second similarity scores.

A computerized method of authenticating a user of a virtual assistant operating on a computing device, comprising:

• (i) responsive to receiving a user request to access non-restricted information:
• receiving, by the computing device, first biometric data from the user via a first biometric input device in electronic communication with the computing device;
• extracting, by the computing device, one or more first features from the first biometric data;
• generating, by the computing device, a first vector based on the first features;
• computing, by the computing device, using a first neural network in electronic communication with the computing device, a first similarity score reflecting a geometric distance between the first vector and a first reference vector stored in memory of the computing device;
• and
• determining, by the computing device, a right to access the non-transactional information based on the similarity score;
• and
• (ii) responsive to receiving a user request to access restricted information, completing all of the steps of (i) and further:
• receiving, by the computing device, second biometric data from the user via a second biometric input device in electronic communication with the computing device;
• extracting, by the computing device, one or more second features from the second biometric data;
• generating, by the computing device, a second vector based on the second features;
• computing, by the computing device, using a second neural network in electronic communication with the computing device, a second similarity score reflecting a geometric distance between the second vector and a second reference vector stored in memory of the computing device;
• determining, by the computing device, using a third neural network in electronic communication with the computing device, a confidence score based on the first and second similarity scores;
• and
• determining, by the computing device, a right to access the restricted information based on the confidence score.