And in May 2009, members of the site attacked YouTube, posting pornographic videos on the site The metadata on other photos - including those of model Kate Upton - suggests they were taken more recently.
New wave of nude photo leaks plague celebrities as
Hilton, who has since deleted the photos from the site, told his followers: 'I acted in haste just to get the post up and didn't really think things through.
'It is important for celebrities and the general public to remember that images and data no longer just reside on the device that captured it,' security researcher Ken Westin wrote in a blog post Monday.