PHNOM PENH -- Microsoft and British intelligence specialists opened a two-week seminar Monday to train Cambodians how to fight against pedophiles who use the Internet to exploit children in the impoverished Southeast Asian nation.

About 150 Cambodian, Indonesian and Thai law enforcement officials and humanitarian workers will learn a range of computer know-how -- from the basics of how the Internet works to tracing sex offenders to network security. The training is run by Britain's National Criminal Intelligence Service, its National Crime Squad and software giant Microsoft.  Cambodia has struggled to root out foreign pedophiles who target the country because of its lax law enforcement and deep poverty. Children often work in tourism locales, selling fruit, flowers or trinkets, leaving them vulnerable to pedophiles.

There are about 33,000 child sex workers in Cambodia, according to the U.N. children's agency.  In recent years, the country has experienced a sharp increase in the production and dissemination of child pornography via the Internet.

In June, the U.S. State Department listed Cambodia among 14 countries it deemed the worst at adequately addressing trafficking problems, including the trade of child sex workers. "Many Cambodian children have never used a computer and they never in their lives used the Internet, but the abuse of Cambodian children by pedophiles occurs daily as pedophiles use the Internet and computers to plan, coordinate and facilitate their crimes against children," Bostick said.

Cambodia is one of the world's poorest countries; it is estimated that about 42 percent of Cambodia's 15 million people live on $1 a day or less.

But there are many Web sites with photos and information for pedophiles looking to commit crimes in countries such as Thailand and Cambodia.