Patent ID: 8723831
Filing Date: 2014-05-13
Classification: G06F

Abstract:
1. A portable device comprising: a touch screen that includes a display screen and that generates touch screen data in response to a user's interaction with the touch screen; a processor for executing a security application for authenticating the user to the portable device, wherein the security application includes a plurality of security levels including a first security level and a second security level, the security application including: authenticating the user to the portable device at the first security level when the authentication shape is recognized based on at least one of: the size independent shape descriptor and the orientation independent shape descriptor; authenticating the user to the portable device at the second security level when the authentication shape is recognized based on at least one of: the size dependent shape descriptor and the orientation dependent shape descriptor; wherein the user's interaction with the touch screen includes a line drawing corresponding to the authentication shape that includes at least one point of self intersection.