Patent ID: 11868457
Assignee: NEOPAD INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 3:
4. A user authentication and signature device comprising:
a user information device including a touch display and a computing function;
the user information device including a user biometric recognition processor configured to acquire biometrics of a user from the user using a user bio-input/output device provided in the user information device, store the biometrics in an information device memory of the user, and recognize the user on the basis of the acquired and stored biometrics of the user;
a user image data management processor configured to store and manage, in the user information device, specific image data to be displayed on the touch display of the user information device;
a processor configured to display an encryption key input window which requests user encryption key authentication on the touch display of the user information device;
an encryption key generation image upload processor for user authentication configured to display image data selected by the user or the user image data management processor from among pieces of image data stored in an image storage device of the user information device again on the touch display of the user information device by uploading the selected image data in response to the user encryption key authentication request;
an encryption key generation data acquisition processor for user authentication configured to acquire encryption key generation data for user authentication when the user remembers and touches a pixel again at the same position as the pixel designated by a touch during user encryption key registration in the image data;
an encryption key generation processor for user authentication configured to generate an encryption key for user authentication by encrypting the encryption key generation data for user authentication acquired by the encryption key generation data acquisition processor for user authentication; and
an encryption key authentication processor for user registration configured to make a decision by comparing the generated encryption key again by the encryption key generation processor for user authentication with an encryption key already stored in the user information device or a device requesting user encryption key authentication,
wherein the encryption key generation data acquisition processor for user authentication, which acquires the encryption key generation data for user authentication when the user remembers and touches the pixel again at the same position as the pixel designated by the touch during the user encryption key registration in the displayed image data again by the encryption key generation image upload processor for user authentication, comprises one of:
(a) a processor configured to reacquire biometrics of the user from the user using a biometrics input/output device, confirm that users are identical to each other by comparing the reacquired biometrics of the user with the previously acquired and stored biometrics of the user, and then acquire, when the user remembers and touches the pixel again at the same position as the pixel designated by a touch during user encryption key generation in the displayed image data again, coordinate values of the pixel touched again and color values of the pixel touched again; and
(b) a processor configured to reacquire, when the user remembers and touches the pixel again at the same position as the pixel designated by the touch during the user encryption key registration in the displayed image data again, biometrics of the user and compare the reacquired biometrics of the user with the biometrics of the user stored by the user biometric recognition processor and simultaneously acquire coordinate values of the pixel touched again and color values of the pixel touched again.