Exorcism is the main topic of a week-long conference being held this week in Rome under the Vatican’s authority, reports The Telegraph.
Experts are saying that the web has made it dangerously easy to access information on Devil-worshipping and the occult.
"The internet makes it much easier than in the past to find information about Satanism," stated Carlo Climati, a member of the Vatican university who specialises in the dangers posed to young people by Satanism.
"In just a few minutes you can contact Satanist groups and research occultism. The conference is not about how to become an exorcist. It's to share information about exorcism, Satanism and sects. It's to give help to families and priests. There is a particular risk for young people who are in difficulties or who are emotionally fragile," said Mr Climati.
The object of the Vatican-sponsored seminar was to investigate the phenomenon of Satanism with "seriousness and scientific rigour", avoiding a "superficial or sensational approach" he added.
The conference brought together over 60 Catholic clergy as well as doctors, psychologists, psychiatrists, teachers and youth workers to discuss how to combat the dangers of Devil-worship.
Organisers are convinced that the rise of Satan worship has grown dangerously over the last few years.
"There's been a revival," said Father Gabriele Nanni, a former exorcist and another speaker at the course.
Father Nanni said that although the number of genuine possessions is relatively small, "we must be on guard because occult and Satanist practices are spreading a great deal, in part with the help of the internet and new technologies that make it easier to access these rituals."
Although any priest could perform an exorcism, Vatican experts have urged their clergy to call in professional exorcists whenever "the moral certainty has been reached that the person is possessed."
Possessed behaviour could include radical and disturbing changes in the person's behaviour and voice, or an ability to garble in foreign languages or nonsensical gibberish.
Father Gabriele Amorth stated people who are possessed by Satan vomit shards of glass and pieces of iron, scream, dribble and slobber, utter blasphemies and have to be physically restrained.
Amorth also believes that the sex abuse scandals devastating the Church in the US, Ireland, Germany and other countries, are proof that the anti-Christ was waging a war against the Church.
(Image is Father Gabriele Amorth, the Vatican's official exorcist).