The web-site tells about several online tools, using which you can verify the authenticity of photos, extract as much data from them as possible, and to find more information about a person.
Google also shows similar images, and sometimes it helps to determine if the photo was edited.
As usual a reference to a high-resolution image would be the original source. You also have to check a person that spreads information.
There are several different tools that can help to gather information about him/her.
Though they are mostly designed for the US residents, but there are also some that will be useful for residents of other countries.
For example, looks for “Internet trace” of a user, helps to identify him/her, to find photos.
You have to enter the name of the person in Latin and the program will run search through all American social networks (Facebook, Linked In, My Space).
The feature of the program is that it runs search through deep Web, which is ignored by ordinary search engines and is not available for users.
Besides, the program will also provide EXIF-data of a photo. You could upload a photo there in order to find its origin source and to examine where else it was published. JPEGSnoop– a program that has to be installed (only for Windows).
It shows metadata not only of images, but also of such formats as AVI, DNG, PDF, THM. For example, it makes possible to detect errors in corrupted file, to find out if an image was edited and so on. To determine a photographer or an origin of a photo.