Patent ID: 8136154
Filing Date: 2012-03-13
Classification: G06F,G06K,G10L

Abstract:
1. A method comprising: collecting at a computer keypad, a plurality of first enrollment keystroke vectors from a first enrolling user; constructing a first Hidden Markov Model (“HMM”) based on the plurality of first enrollment keystroke vectors; collecting a second plurality of enrollment keystroke vectors from a second enrolling user; constructing a second HMM based on the second plurality of enrollment keystroke vectors; collecting a claimed identity from an authenticating user; collecting a test keystroke vector from the authenticating user; computing a first probability that the authenticating user is identical to the enrolling user based on the test keystroke vector and the HMM; computing a second probability that the authenticating user is identical to the second enrolling user based on the test keystroke vector and the second HMM; and computing a third probability that the test keystroke vector was produced by the claimed identity using an HMM associated with the claimed identity; and performing a user authentication based on a ratio between the third probability and a maximum probability of the first and second probabilities.