ally is the original image. • Check to see if the image has any EXIF data (metadata). Use software like Photoshop or free tools such as Fotoforensics.com or Findexif.com to see information about the model of the camera, the timestamp of the image (caution: the data could default to the manufacturer’s settings), and the dimensions of the original image. • Social networks like Twitter, Facebook and Instagram strip out most metadata. Flickr is an exception. Instead, try Geofeedia and Ban.jo to identify the GPS data from the mobile device that uploaded the image. For verifying provenance of video: • Use acronyms, place names and other pronouns for good keyword search on video sharing platforms such as YouTube, Vimeo and Youku. • Use Google Translate when dealing with contents in a foreign language. • Use the date filter to find the earliest videos matching the keywords. • Use Google Image Search or TinEye to perform a reverse video thumbnail search. Source With the original content identified, gather information about the author/originator of the content. The goal is to confirm whether the person behind the account is a reliable source. Examine an uploader’s digital footprint by asking these questions: • Can you confirm the identity of, and contact, the person? • Are you familiar with this account? Has their content and reportage been reliable in the past? • Check the history of the uploader on the social network: • • °° How active are they on the account? °° What do they talk about/share? °° What biographical information is evident on the account? Does it link anywhere else? What kind of content have they previously uploaded? °° Where is the uploader based, judging by the account history? Check who they are connected on the social network: °° Who are their friends and followers? °° Who are they following? °° Who do they interact with? °° Are they on anyone else’s lists? Try to find other accounts associated with the same name/username on other social networks in order to find more information: °° If you find a real name, use people search tools (Spokeo, White Pages, Pipl.com, WebMii) to find the person’s address, email and telephone number. °° Check other social networks, such as LinkedIn, to find out about the person’s professional background. 99