As wireless networks flourish, Internet users can access social network
platforms (such as Facebook and Twitter) through personal electronic devices
anywhere and anytime. However, because users often deploy social network
platforms in a public network setting, a common concern remains about
how to guarantee privacy for photo sharing. Although most platforms aim to
protect such privacy, few are able to reach the goal. This work focuses on an
interesting potential privacy risk, called the deletion delay of photo sharing,
by pinpointing and investigating the risk’s existence in some well-known social
network platforms.