Saudi Arabia, the world's biggest oil exporter, has identified the Internet as a key battlefield with militants who launched a campaign to topple the U.S.-allied ruling royal family in 2003.
"Research shows there are more than 5,600 sites on the Internet promoting the ideology of al-Qaida," Khaled al-Faram told the Information Technology and National Security conference in the Saudi capital of Riyadh.
"There are some 900 news sites appearing every year, and despite the retreat of some media outlets specifically run by al-Qaida, extremist Web sites are constantly on the rise."
He said it was difficult to track most of the sites, though hard-core al-Qaida sites often change addresses to avoid detection or start up again elsewhere once infiltrated.
Faram was addressing a conference organized by the Saudi intelligence agency to encourage the public to cooperate more with the government and share expertise on how to.
This week the Saudi intelligence agency launched a Web site in an effort to open up to the public and change the negative perceptions of security services. People can send information anonymously to the site about any suspicious activity.
"Mukhabarat" (intelligence) agencies are generally feared around the Arab world as tools of governments that abuse human rights. Saudi Arabian intelligence uses the name "Istikhbarat" partly to avoid the negative connotation of the traditional term.
"The real battle with al-Qaida is no longer on the ground, but rather a media battle, and it is a real threat to national security," Faram told Reuters.
"For al-Qaida, media coverage is more important than the actual operations," he said.
The Islamist network al-Qaida is headed by Saudi-born
"The Internet, chat lines, text messages--these are the new warriors," said Alessandro Zanasi, an expert on Internet monitoring known as "text mining."