article_snippet.sent: Kevin Bollaert, 28, was sentenced to 18 years after he was convicted in February of 21 counts of identity theft and six counts of extortion  for running websites that capitalised on the internet as a forum for public shaming .
article_snippet.sent: Most of the photographs and videos of sexual abuse that the IWF found online were on websites hosted in North America.
article_snippet.sent: Criminals are using many legitimate websites to distribute pictures and videos of child sexual abuse imagery, the IWF said.
article_snippet.sent: In particular, Criminals targeted websites which are specifically designed to allow users to upload pictures, and make Criminals available via a unique web page address, or 'URL'.
article_snippet.sent: Paedophiles are using the digital currency bitcoin to buy child sexual abuse images online, the IWF found.
article_snippet.sent: the IWF said a number of the most prolific commercial child sexual abuse websites started accepting the currency last year.
highlights_snippet.sent: Most pictures and videos found online were on websites in North America .