The Child Exploitation and Online Protection Centre (Ceop) has said it in concerned by the rise in the use of the 'hidden internet' - heavily encrypted forums and pages that allow abusers to cover their tracks.
UK daily users connecting to secret or encrypted networks increased by two thirds in 2012, Ceop reported, although not all of these will use the hidden internet for criminal means.
This number is set to reach to 20,000 by the end of this year.
More top news
Matt Hancock believes the devices can have a “real impact” on pupils’ achievements.
Court of Appeal judges in London will review his 30-year jail term for sex offences against boys he coached between 1979 and 1991.
Brexit and security, cannabis law and children’s mobiles dominate the papers on Wednesday.