International Business Machines Corporation
Systems and methods for authentication of a user based on free text

Abstract:

There is provided a computer implemented method of authenticating a user, comprising: receiving a sequence of key-related events of a manually typed text by a user using a keyboard, extracting a plurality of sub-features from the sequence of key-related events, for each instance of a plurality of instances of a respective n-gram of a plurality of n-grams extracted from the text, computing a plurality of statistical features for each respective n-gram from the plurality of sub-features extracted for the plurality of instances of the respective n-grams, feeding the plurality of statistical features computed for each of the plurality of n-grams into a trained machine learning (ML) model, and triggering a security process when the ML model outputs an indication of non-authentication of the user.