1. An electronic image-capturing apparatus, comprising: an image-capturing element that captures an image of a subject and generates electronic image information; a recording device that records the electronic image information that has been generated in a recording medium; a registration device that registers inherent information with respect to a registrant; an information detection device that detects inherent information with respect to a user of the electronic image-capturing apparatus; an information verification device that references the inherent information with respect to the user detected by the information detection device with the inherent information registered in the registration device; a control device that allows an image-capturing operation to be performed on the electronic image-capturing apparatus if it is decided by the information verification device that the two sets of inherent information match; and a digital watermarking device that adds information related to the inherent information detected by said information detection device to the electronic image information that has been generated as a digital watermark.