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

Claim 9:
10. A user authentication and signature method comprising:
receiving an authentication request for a registered user encryption key;
displaying, on a touch display of a user information device, image data selected for an encryption key for user registration by a user or an image data processor from among pieces of image data stored in an image storage device of the user information device again by uploading the selected image data in response to the authentication request for the user encryption key;
acquiring 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 registration of a user encryption key in the displayed image data again;
generating an encryption key for user authentication by encrypting the encryption key generation data for user authentication; and
making a decision by comparing the generated encryption key again by an 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 acquiring of 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 registration of the user encryption key in the displayed image data again comprises one of:
(a) reacquiring biometrics of the user from the user using a biometrics input/output device, confirming 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 acquiring, when the user remembers and touches the pixel again at the same position as the pixel designated by the touch during the registration of the user encryption key in the displayed image data again, coordinate values of the pixel touched again and color values of the pixel touched again; and
(b) re-acquiring, when the user remembers and touches the pixel again at the same position as the pixel designated by the touch during the registration of the user encryption key in the displayed image data again, biometrics of the user, comparing the reacquired biometrics of the user with the biometrics of the user stored by a user biometric recognition processor, and simultaneously acquiring coordinate values of the pixel touched again and color values of the pixel touched again.