Patent ID: 9330248
Filing Date: 2016-05-03
CPC Classification: G06F

Claim Text:
1. A user authentication device of a portable terminal that provides a plurality of execution environments wherein at least one application is executable in a first of the plurality of execution environments and at least another application is executable in a second of the plurality of execution environments, the device comprising: an authentication information input unit configured to provide a virtual keyboard in response to a user authentication request and generate authentication data using coordinate data inputted through the virtual keyboard; and an authentication information processing unit configured to approve the authentication data, wherein same keyboard coordinates of the virtual keyboard are shared by the first and the second of the plurality of execution environments in response to the execution of the at least one of the applications in the first of the plurality of execution environments requesting to use a resource of the second of the plurality of execution environments, wherein the same keyboard coordinates of the virtual keyboard are changed in response to the user inputting at least one of a personal identification number (PIN) and a password, wherein the authentication information input unit is configured to generate the authentication data based on identification data of the virtual keyboard, reference data representing reference directions of the keyboard coordinates, and the coordinate data.