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

Claim 4:
5. The user authentication and signature device of claim 4, wherein the encryption key generation processor for user authentication configured to generate the encryption key for user authentication by encrypting touch data of the user acquired again and the stored biometrics of the user comprises any one of:
(a) the encryption key generation processor for user authentication configured to select at least one of the coordinate values of the pixel touched again, the color values of the pixel touched again, and the biometrics of the user acquired from the user using the biometrics input/output device and stored in the information device memory of the user, encrypt each piece of the selected values, and generate, as the encryption key for user authentication, any one of data obtained by combining the encrypted pieces of data, data obtained by combining one or more of the encrypted pieces of data and a non-encrypted data, and data obtained by re-encrypting a combined data; and
(b) the encryption key generation processor for user authentication configured to combine at least two of the coordinate values of the pixel touched again, the color values of the pixel touched again, and the biometrics of the user acquired from the user using the biometrics input/output device and stored in the information device memory of the user, encrypt the combined data, and then generate, as the encryption key for user authentication, any one of the encrypted data, data obtained by combining the combined and encrypted data and the non-encrypted data, and data obtained by re-encrypting the combined data.