Computer game makers should be recruited by government to help stop young Muslims being radicalised, the former reviewer of anti-terrorism legislation has said.
Lord Carlile urged ministers to work with people who create games on the internet to stop the flow of British teenagers fleeing to the Middle East to fight for Isil.
The Liberal Democrat peer said it was essential to fight fire with the same sort of fire by tackling radicalisation through creating a competing online narrative.
It comes after a 17-year-old from Dewsbury is believed to have become Britains youngest ever suicide bomber after blowing himself up in Iraq.
The Family of Talha Asmal, identified from Isil social media sites as having taken part in the attack, said he was exploited by radicals online who targeted and befriended him.
The Foreign Office believes more than 700 Britons have travelled to the Middle East to fight alongside Islamic extremists, with half estimated to have already returned to Britain.
Speaking on BBC Radio Fours Today Programme after Mr Asmals death, Lord Carlile called for the government to work with computer programmers to counter the online propaganda from Isil.
Its hard to counter, but one has does have to use the same tools, the same thought processes, that do radicalise people, said Lord Carlile, independent reviewer of terrorism legislation from 2001 to 2008.
He added: The government must sit down with the best brains who, for example, create games on the internet, who write programme for the Internet, and they must try and produce the same methods to show that the good guys sometimes win.
That being radicalised and going to fight for Isil is actually a ghastly thing to do, that it destroys families, that actually happiness can be obtained by having an ordinary British life.
*Lord Carlile
Were talking mostly about very bright young men and women and I believe that they are persuadable but one has to fight fire with the same sort of fire.
Social media reports linked to Isil identified Mr Asmal, going by the name of Abu Yusuf al-Britain, as having taken part in the attack.
A statement issued by Asmal's family said: "Talha was a loving, kind, caring and affable teenager.
"He never harboured any ill will against anybody nor did he ever exhibit any violent, extreme or radical views of any kind.
"Talha's tender years and naivety were it seems however exploited by persons unknown who, hiding behind the anonymity of the world wide web, targeted and befriended Talha and engaged in a process of deliberate and calculated grooming of him.
"Whilst there it appears that Talha fell under the spell of individuals who continued to prey on his innocence and vulnerability to the point where if the press reports are accurate he was ordered to his death by so-called Isil handlers and leaders too cowardly to do their own dirty work.
"We are all naturally utterly devastated and heartbroken by the unspeakable tragedy that now appears to have befallen us."
