Patent ID: 11863908
Assignee: HANWHA VISION CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 7:
8. A method, performed by an image processing device, of encrypting image data, the method comprising:
selecting an encryption target unit from among a plurality of units constituting an image;
generating a table including identification information about the encryption target unit;
generating a first encryption unit comprising data obtained by encrypting the encryption target unit;
generating a second encryption unit comprising data obtained by encrypting the table;
generating a bitstream comprising the first encryption unit, the second encryption unit, and units other than the encryption target unit among the plurality of units constituting the image; and
prior to the selecting the encryption target unit, selecting a method for selecting the encryption target unit, based on whether the image processing device satisfies a first arithmetic operation condition, wherein the method for selecting the encryption target unit comprises:
based on the image processing device satisfying the first arithmetic operation condition, selecting a first method in which the encryption target unit is selected based on analysis of an event in the image; and
based on the image processing device not satisfying the first arithmetic operation condition, selecting a second method in which the encryption target unit is selected randomly.