"JGKDK" is an app that encrypts photos and allows users to save private photos. In the image encryption function page, users can encrypt their private photos into a two-dimensional code, and the encrypted two-dimensional code can only be decrypted in the image decryption function of our APP to see the original image. At the same time, we also have the picture metadata function for users to parse the picture metadata they want to understand. In addition, we also have a collection of wallpapers, a collection of multiple types of wallpapers, for users to download to the phone album to use, can be used as a lock screen background or desktop background.