Patent ID: 11971976
Assignee: PAYPAL, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. A method comprising:
accessing text data corresponding to a corpus of documents;
parsing the text data to select a text string for use in a query;
generating, based on a machine learning model, the query by removing a select set of words from the text string;
determining, based on the machine learning model, one or more acceptable answers for the query with the select set of words removed from the text string, wherein the one or more acceptable answers are determined based on 1) word representations generated from the text data and 2) a training set of word representations determined from at least one of previous messages associated with a user or the corpus of documents;
transmitting the query to a user device of the user from which an authentication request is received;
receiving a user response to the query from the user device with the select set of words removed from the text string; and
authenticating the user device by comparing the user response to the one or more acceptable answers and determining that one or more matches exist.