Patent ID: 9558336
Date: 2017-01-31
CPC Classifications: A61B,G06F,G06K,H04L,H04W,Y02D

Claim:
1. A method for persistent authentication of a user, comprising (a) sensing photoplethysmography (PPG) information of a user wearing a user-wearable device, (b) performing or receiving results of an authentication determination that compares the sensed PPG information to baseline PPG information to determine whether or not they match one another, wherein if the sensed PPG information matches the baseline PPG information then the user wearing the user-wearable device is authenticated; (c) after determining or receiving an indication that the user wearing the user-wearable device is authenticated, monitoring whether or not the user-wearable device remains being worn by the user, (d) after determining or receiving an indication that the user wearing the user-wearable device is authenticated, for a predetermined period of time that the user-wearable device remains being worn by the user continually concluding that the user wearing the user-wearable device is authenticated without repeating steps (a) and (b); and