Dynamic one-time use knowledge-based authentication via multi-sourced private data using artificial intelligence techniques

A computer-implemented method for passwordless authentication, comprising:

• receiving, by an authentication system, a private corpus of data associated with a user;
• processing, by the authentication system, the private corpus to initiate generation of a set of challenge questions;
• receiving, by the authentication system and over a network, a request for authentication from a user device associated with the user;
• reading a first record from the private corpus of data, in response to receiving the request for authentication;
• generating an intermediate semantic representation that associates conceptual knowledge with linguistic expressions from the first record;
• generating distractor content to differ semantically while remaining contextually plausible;
• generating distractor sentences using concepts drawn from different knowledge domains;
• using pre-identified tags, a genre table for the data set and semantic representation, for constructing a human-readable sentence with natural-language statements based on the first record,
• wherein the genre table determines vocabulary selection, sentence form and narrative framing for constructing the human-readable sentence that is contextually appropriate;
• maintaining domain-specific linguistic structures defining permissible vocabulary, sentence forms, and conceptual groupings used during content generation;
• repeating the reading and constructing steps until a plurality of human-readable sentences are constructed for each of the records in the private corpus of data;
• evaluating the generated content against domain rules to ensure consistency with intended subject matter prior to presentation,
• wherein the plurality of the human-readable sentences form a set of challenge questions;
• delivering, by the authentication system and to the user device via the network, a first challenge question from the set of challenge questions;
• responsive to receiving, by the authentication system and over the network and from the user device, the correct answer to the first challenge question, authenticating the user;
• and
• granting, by the authentication system, access to at least one of a secure computer, application or website.