"There are some searches which are so abhorrent and where they can be no doubt whatsoever about the sick and malevolent intent of the searcher that there should be no search results returned at all," Cameron was due to say in a speech in London.
"So I have a very clear message for Google, Bing, Yahoo and the rest. You have a duty to act on this, and it is a moral duty."
According to extracts issued by his office, Cameron will give the companies until October to comply, saying all the "great brains" who work for them should be able to overcome any technical difficulties.
"I can tell you we are already looking at the legislative options we have to force action," he will say.
Cameron has been pressuring Internet companies to tackle online abuse for several months, after two high-profile trials over child sex murders in which the killers were both found to have searched for child porn online.
"This is quite simply about obliterating this disgusting material from the net and we will do whatever it takes," he will say.
Companies like Google say they already remove any abusive images of children as soon as they are reported, and the US Internet giant insists it has a "zero tolerance attitude" to such content.
Jim Killock, head of the Open Rights Group which defends Internet freedoms, said he did not believe the prime minister's proposed 'blacklist' of search terms would have any real impact.
Most child abuse images are circulated in private networks or sold by criminal gangs, he said, and noted that if some search terms are banned, people will simply develop new ones.
In a blog posting, he concluded that the proposed policy "is likely to be of highly marginal impact".
Yvette Cooper, a lawmaker who speaks for the opposition Labour party on home affairs, said the government should invest more money in the Child Exploitation and Online Protection Centre (CEOP).
The state-funded body works with police and other child protection agencies and, under Cameron's plans, would draw up the blacklist.
COMMENTS (4)
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It is a good step. However, he should also take interest to stop the adult pornography, and gay marriages.
Nothing more than throwing somebody into the waters and then asking not to get wet.
The use of smartphones or facebook by minors is very questionable. Only because technology has become available and cheaper doesn't mean that we provide our kids with laptops and smartphones. Every thing has its merits and demerits and I am sure the curiosity of kids will only lead them towards dark side.
There is no use of smartphones at this age however we can teach our children sports and other useful things which will be worthy in their later life!!!
Though this may be irrelevant for most of the South Asians,but please ask ur kids not to use instagram or kik messenger...
My American colleague has a 14 yr old daughter who uses instagram with all those hashtags..One day,she got a comment from someone asking for kik account??? After she gave,she was getting messages from that person and started chatting for few days...Then,the person started asking very personal questions and photos of her privates...
Luckily,she was wise enough and informed her parents,but since kik messenger uses a username,not a phone number like whatsapp or viber,..It was impossible to track this person and kik company didnt accept their requests citing user privacy
Also,she literally gave away her location,her schoolname,her hangout areas just through her instagram photos and can be used for pedos to track and kidnap children...
Just my 2 cents for all those who use instagram