Digital camera storing and outputting encrypted digital image data

摘要

An image pickup apparatus certifies unchanged image data by photographing a person using the image pickup apparatus. Two steps are carried out with the image pickup apparatus, coding image data and enciphering the coded image data, which includes changing the original data to encryption data. The enciphering also includes adding a watermark to the coded data. The coding of the image data and enciphering of the coded data are performed before the coded data is stored in a medium or is transferred to another device.