Websites 'Keeping Deleted Photos'

User photographs can still be found on many social networking sites even after people have deleted them, Cambridge University researchers have said. To perform their experiment, the researchers uploaded photos to 16 popular websites, then deleted them, but kept a note of direct URLs to the photos from the sites' content delivery networks.

When they checked 30 days later, these links continued to work for seven of the sites even though a typical user might think the photos had been removed.